102112122222021 has 4 divisors (see below), whose sum is σ = 136149496296032. Its totient is φ = 68074748148012.

The previous prime is 102112122221969. The next prime is 102112122222029. The reversal of 102112122222021 is 120222221211201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 102112122222021 - 2²³ = 102112113833413 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 (102112122222029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17018687037001 + ... + 17018687037006.

It is an arithmetic number, because the mean of its divisors is an integer number (34037374074008).

Almost surely, 2^{102112122222021} is an apocalyptic number.

It is an amenable number.

102112122222021 is a deficient number, since it is larger than the sum of its proper divisors (34037374074011).

102112122222021 is an equidigital number, since it uses as much as digits as its factorization.

102112122222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34037374074010.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 102112122222021 its reverse (120222221211201), we get a palindrome (222334343433222).

The spelling of 102112122222021 in words is "one hundred two trillion, one hundred twelve billion, one hundred twenty-two million, two hundred twenty-two thousand, twenty-one".