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212112210021 = 33710719193503
BaseRepresentation
bin1100010110001011011…
…1110111100001100101
3202021111110112201001120
43011202313313201211
511433401211210041
6241235404444153
721216224015445
oct3054267674145
9667443481046
10212112210021
1181a578a3928
1235137b49659
13170047b0c5a
14a3a298c125
1557b69ac366
hex3162df7865

212112210021 has 32 divisors (see below), whose sum is σ = 294712639488. Its totient is φ = 135585380160.

The previous prime is 212112210019. The next prime is 212112210029. The reversal of 212112210021 is 120012211212.

It is not a de Polignac number, because 212112210021 - 21 = 212112210019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212112210029) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2221756 + ... + 2315258.

It is an arithmetic number, because the mean of its divisors is an integer number (9209769984).

Almost surely, 2212112210021 is an apocalyptic number.

It is an amenable number.

212112210021 is a deficient number, since it is larger than the sum of its proper divisors (82600429467).

212112210021 is a wasteful number, since it uses less digits than its factorization.

212112210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93841.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 212112210021 its reverse (120012211212), we get a palindrome (332124421233).

The spelling of 212112210021 in words is "two hundred twelve billion, one hundred twelve million, two hundred ten thousand, twenty-one".

Divisors: 1 3 37 107 111 191 321 573 3959 7067 11877 20437 21201 61311 93503 280509 756169 2268507 3459611 10004821 10378833 17859073 30014463 53577219 370178377 660785701 1110535131 1910920811 1982357103 5732762433 70704070007 212112210021