102112012210021 has 8 divisors (see below), whose sum is σ = 111404856989664. Its totient is φ = 92820823193520.

The previous prime is 102112012210001. The next prime is 102112012210031. The reversal of 102112012210021 is 120012210211201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102112012210021 is a prime.

It is a super-2 number, since 2×102112012210021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102112012209977 and 102112012210004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102112012210001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 413811831 + ... + 414058516.

It is an arithmetic number, because the mean of its divisors is an integer number (13925607123708).

Almost surely, 2^{102112012210021} is an apocalyptic number.

102112012210021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

102112012210021 is a deficient number, since it is larger than the sum of its proper divisors (9292844779643).

102112012210021 is a wasteful number, since it uses less digits than its factorization.

102112012210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827881571.

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

Adding to 102112012210021 its reverse (120012210211201), we get a palindrome (222124222421222).

The spelling of 102112012210021 in words is "one hundred two trillion, one hundred twelve billion, twelve million, two hundred ten thousand, twenty-one".