123202203221021 has 4 divisors (see below), whose sum is σ = 123321469633692. Its totient is φ = 123082936808352.

The previous prime is 123202203220973. The next prime is 123202203221029. The reversal of 123202203221021 is 120122302202321.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 109925369320900 + 13276833900121 = 10484530^2 + 3643739^2 .

It is a cyclic number.

It is not a de Polignac number, because 123202203221021 - 2³⁴ = 123185023351837 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 (123202203221029) 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, 59633204786 + ... + 59633206851.

It is an arithmetic number, because the mean of its divisors is an integer number (30830367408423).

Almost surely, 2^{123202203221021} is an apocalyptic number.

It is an amenable number.

123202203221021 is a deficient number, since it is larger than the sum of its proper divisors (119266412671).

123202203221021 is a wasteful number, since it uses less digits than its factorization.

123202203221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119266412670.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 123202203221021 its reverse (120122302202321), we get a palindrome (243324505423342).

The spelling of 123202203221021 in words is "one hundred twenty-three trillion, two hundred two billion, two hundred three million, two hundred twenty-one thousand, twenty-one".