31052542121 has 4 divisors (see below), whose sum is σ = 32402652672. Its totient is φ = 29702431572.

The previous prime is 31052542111. The next prime is 31052542123. The reversal of 31052542121 is 12124525013.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12124525013 = 1373 ⋅8830681.

It is a cyclic number.

It is not a de Polignac number, because 31052542121 - 2¹⁰ = 31052541097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31052542123) 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, 675055241 + ... + 675055286.

It is an arithmetic number, because the mean of its divisors is an integer number (8100663168).

Almost surely, 2^31052542121 is an apocalyptic number.

It is an amenable number.

31052542121 is a deficient number, since it is larger than the sum of its proper divisors (1350110551).

31052542121 is a wasteful number, since it uses less digits than its factorization.

31052542121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1350110550.

The product of its (nonzero) digits is 2400, while the sum is 26.

The spelling of 31052542121 in words is "thirty-one billion, fifty-two million, five hundred forty-two thousand, one hundred twenty-one".