972121023 has 12 divisors (see below), whose sum is σ = 1425133528. Its totient is φ = 638407440.

The previous prime is 972120973. The next prime is 972121039. The reversal of 972121023 is 320121279.

It is not a de Polignac number, because 972121023 - 2¹² = 972116927 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 (972121043) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 805468 + ... + 806673.

Almost surely, 2^972121023 is an apocalyptic number.

972121023 is a deficient number, since it is larger than the sum of its proper divisors (453012505).

972121023 is a wasteful number, since it uses less digits than its factorization.

972121023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1612214 (or 1612211 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 972121023 is about 31178.8553830958. The cubic root of 972121023 is about 990.6192850138.

The spelling of 972121023 in words is "nine hundred seventy-two million, one hundred twenty-one thousand, twenty-three".