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2101212102101 = 73741349566971
BaseRepresentation
bin11110100100111010000…
…000000011110111010101
321102212121002021100201012
4132210322000003313111
5233411240244231401
64245141123342005
7304543665114650
oct36447200036725
97385532240635
102101212102101
117401344a9162
1229b28b821905
131231b3214898
14739b08b0897
15399cd8438bb
hex1e93a003dd5

2101212102101 has 32 divisors (see below), whose sum is σ = 2533684473600. Its totient is φ = 1704720038400.

The previous prime is 2101212102061. The next prime is 2101212102139. The reversal of 2101212102101 is 1012012121012.

It is a cyclic number.

It is not a de Polignac number, because 2101212102101 - 26 = 2101212102037 is a prime.

It is a super-2 number, since 2×21012121021012 (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101212102151) 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, 3422546 + ... + 3989516.

It is an arithmetic number, because the mean of its divisors is an integer number (79177639800).

Almost surely, 22101212102101 is an apocalyptic number.

It is an amenable number.

2101212102101 is a deficient number, since it is larger than the sum of its proper divisors (432472371499).

2101212102101 is a wasteful number, since it uses less digits than its factorization.

2101212102101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 567405.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 2101212102101 its reverse (1012012121012), we get a palindrome (3113224223113).

The spelling of 2101212102101 in words is "two trillion, one hundred one billion, two hundred twelve million, one hundred two thousand, one hundred one".

Divisors: 1 7 37 41 259 287 349 1517 2443 10619 12913 14309 90391 100163 529433 566971 3706031 3968797 20977927 23245811 146845489 162720677 197872879 860095007 1385110153 6020665049 7321296523 8112788039 51249075661 56789516273 300173157443 2101212102101