102120021112021 has 32 divisors (see below), whose sum is σ = 118538444583936. Its totient is φ = 86944740960000.

The previous prime is 102120021112019. The next prime is 102120021112027. The reversal of 102120021112021 is 120211120021201.

It is not a de Polignac number, because 102120021112021 - 2¹ = 102120021112019 is a prime.

It is a super-2 number, since 2×102120021112021² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 102120021111986 and 102120021112004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102120021112027) 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, 208996446 + ... + 209484496.

It is an arithmetic number, because the mean of its divisors is an integer number (3704326393248).

Almost surely, 2^{102120021112021} is an apocalyptic number.

102120021112021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

102120021112021 is a deficient number, since it is larger than the sum of its proper divisors (16418423471915).

102120021112021 is a wasteful number, since it uses less digits than its factorization.

102120021112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493593.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 102120021112021 its reverse (120211120021201), we get a palindrome (222331141133222).

The spelling of 102120021112021 in words is "one hundred two trillion, one hundred twenty billion, twenty-one million, one hundred twelve thousand, twenty-one".