102221010121 has 4 divisors (see below), whose sum is σ = 102222064000. Its totient is φ = 102219956244.

The previous prime is 102221010091. The next prime is 102221010137. The reversal of 102221010121 is 121010122201.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 102221010121 - 2¹⁷ = 102220879049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102221010191) 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, 364821 + ... + 580978.

It is an arithmetic number, because the mean of its divisors is an integer number (25555516000).

Almost surely, 2^102221010121 is an apocalyptic number.

It is an amenable number.

102221010121 is a deficient number, since it is larger than the sum of its proper divisors (1053879).

102221010121 is an equidigital number, since it uses as much as digits as its factorization.

102221010121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1053878.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 102221010121 its reverse (121010122201), we get a palindrome (223231132322).

The spelling of 102221010121 in words is "one hundred two billion, two hundred twenty-one million, ten thousand, one hundred twenty-one".