122102302100021 has 4 divisors (see below), whose sum is σ = 122345050216032. Its totient is φ = 121859553984012.

The previous prime is 122102302099997. The next prime is 122102302100101. The reversal of 122102302100021 is 120001203201221.

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 122102302100021 - 2²⁶ = 122102234991157 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 (122102302120021) 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, 121374057251 + ... + 121374058256.

It is an arithmetic number, because the mean of its divisors is an integer number (30586262554008).

Almost surely, 2^{122102302100021} is an apocalyptic number.

It is an amenable number.

122102302100021 is a deficient number, since it is larger than the sum of its proper divisors (242748116011).

122102302100021 is an equidigital number, since it uses as much as digits as its factorization.

122102302100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242748116010.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 122102302100021 its reverse (120001203201221), we get a palindrome (242103505301242).

The spelling of 122102302100021 in words is "one hundred twenty-two trillion, one hundred two billion, three hundred two million, one hundred thousand, twenty-one".