102111212102021 has 16 divisors (see below), whose sum is σ = 107659544256000. Its totient is φ = 96580403103600.

The previous prime is 102111212101979. The next prime is 102111212102023. The reversal of 102111212102021 is 120201212111201.

It is a cyclic number.

It is not a de Polignac number, because 102111212102021 - 2³⁴ = 102094032232837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102111212102023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29716016 + ... + 32973686.

It is an arithmetic number, because the mean of its divisors is an integer number (6728721516000).

Almost surely, 2^{102111212102021} is an apocalyptic number.

It is an amenable number.

102111212102021 is a deficient number, since it is larger than the sum of its proper divisors (5548332153979).

102111212102021 is a wasteful number, since it uses less digits than its factorization.

102111212102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3260360.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 102111212102021 its reverse (120201212111201), we get a palindrome (222312424213222).

The spelling of 102111212102021 in words is "one hundred two trillion, one hundred eleven billion, two hundred twelve million, one hundred two thousand, twenty-one".