102111002221121 has 4 divisors (see below), whose sum is σ = 104283576736512. Its totient is φ = 99938427705732.

The previous prime is 102111002221097. The next prime is 102111002221231. The reversal of 102111002221121 is 121122200111201.

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 a cyclic number.

It is not a de Polignac number, because 102111002221121 - 2³⁰ = 102109928479297 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 102111002221121.

It is not an unprimeable number, because it can be changed into a prime (102111002221321) 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, 1086287257625 + ... + 1086287257718.

It is an arithmetic number, because the mean of its divisors is an integer number (26070894184128).

Almost surely, 2^{102111002221121} is an apocalyptic number.

It is an amenable number.

102111002221121 is a deficient number, since it is larger than the sum of its proper divisors (2172574515391).

102111002221121 is an equidigital number, since it uses as much as digits as its factorization.

102111002221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2172574515390.

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

Adding to 102111002221121 its reverse (121122200111201), we get a palindrome (223233202332322).

The spelling of 102111002221121 in words is "one hundred two trillion, one hundred eleven billion, two million, two hundred twenty-one thousand, one hundred twenty-one".