103123431021 has 48 divisors (see below), whose sum is σ = 153793043712. Its totient is φ = 61097339520.

The previous prime is 103123431013. The next prime is 103123431041. The reversal of 103123431021 is 120134321301.

It is not a de Polignac number, because 103123431021 - 2³ = 103123431013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103123431041) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7376380 + ... + 7390346.

It is an arithmetic number, because the mean of its divisors is an integer number (3204021744).

Almost surely, 2^103123431021 is an apocalyptic number.

It is an amenable number.

103123431021 is a deficient number, since it is larger than the sum of its proper divisors (50669612691).

103123431021 is a wasteful number, since it uses less digits than its factorization.

103123431021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14242 (or 14211 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 103123431021 its reverse (120134321301), we get a palindrome (223257752322).

The spelling of 103123431021 in words is "one hundred three billion, one hundred twenty-three million, four hundred thirty-one thousand, twenty-one".