21102002101012 has 36 divisors (see below), whose sum is σ = 44832627318304. Its totient is φ = 8511731936640.

The previous prime is 21102002101003. The next prime is 21102002101021. The reversal of 21102002101012 is 21010120020112.

It is an interprime number because it is at equal distance from previous prime (21102002101003) and next prime (21102002101021).

It is a super-2 number, since 2×21102002101012² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21102002100983 and 21102002101001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1303872414 + ... + 1303888597.

Almost surely, 2^{21102002101012} is an apocalyptic number.

It is an amenable number.

21102002101012 is an abundant number, since it is smaller than the sum of its proper divisors (23730625217292).

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

21102002101012 is a wasteful number, since it uses less digits than its factorization.

21102002101012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2607761056 (or 2607761037 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21102002101012 its reverse (21010120020112), we get a palindrome (42112122121124).

The spelling of 21102002101012 in words is "twenty-one trillion, one hundred two billion, two million, one hundred one thousand, twelve".