102021220010121 has 4 divisors (see below), whose sum is σ = 136028293346832. Its totient is φ = 68014146673412.

The previous prime is 102021220010117. The next prime is 102021220010153. The reversal of 102021220010121 is 121010022120201.

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 102021220010121 - 2² = 102021220010117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102021220010121.

It is not an unprimeable number, because it can be changed into a prime (102021220010321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17003536668351 + ... + 17003536668356.

It is an arithmetic number, because the mean of its divisors is an integer number (34007073336708).

Almost surely, 2^{102021220010121} is an apocalyptic number.

It is an amenable number.

102021220010121 is a deficient number, since it is larger than the sum of its proper divisors (34007073336711).

102021220010121 is an equidigital number, since it uses as much as digits as its factorization.

102021220010121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34007073336710.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 102021220010121 its reverse (121010022120201), we get a palindrome (223031242130322).

The spelling of 102021220010121 in words is "one hundred two trillion, twenty-one billion, two hundred twenty million, ten thousand, one hundred twenty-one".