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212301131020 = 225114603209647
BaseRepresentation
bin1100010110111000100…
…0100010110100001100
3202021222122000212221121
43011232020202310030
511434243042143040
6241310234010324
721224006560516
oct3055610426414
9667878025847
10212301131020
11820444a9a90
123518b2769a4
1317034989524
14a3bdac8bb6
1557c8378c4a
hex316e222d0c

212301131020 has 48 divisors (see below), whose sum is σ = 486470573568. Its totient is φ = 77183271360.

The previous prime is 212301130981. The next prime is 212301131039. The reversal of 212301131020 is 20131103212.

It is a junction number, because it is equal to n+sod(n) for n = 212301130985 and 212301131003.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 907837 + ... + 1117483.

It is an arithmetic number, because the mean of its divisors is an integer number (10134803616).

Almost surely, 2212301131020 is an apocalyptic number.

212301131020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212301131020 is an abundant number, since it is smaller than the sum of its proper divisors (274169442548).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212301131020 is a wasteful number, since it uses less digits than its factorization.

212301131020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214270 (or 214268 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 212301131020 its reverse (20131103212), we get a palindrome (232432234232).

The spelling of 212301131020 in words is "two hundred twelve billion, three hundred one million, one hundred thirty-one thousand, twenty".

Divisors: 1 2 4 5 10 11 20 22 44 55 110 220 4603 9206 18412 23015 46030 50633 92060 101266 202532 209647 253165 419294 506330 838588 1012660 1048235 2096470 2306117 4192940 4612234 9224468 11530585 23061170 46122340 965005141 1930010282 3860020564 4825025705 9650051410 10615056551 19300102820 21230113102 42460226204 53075282755 106150565510 212301131020