31365452121 has 16 divisors (see below), whose sum is σ = 42102618624. Its totient is φ = 20769646464.

The previous prime is 31365452119. The next prime is 31365452141. The reversal of 31365452121 is 12125456313.

It is not a de Polignac number, because 31365452121 - 2¹ = 31365452119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31365452141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 315021 + ... + 402453.

It is an arithmetic number, because the mean of its divisors is an integer number (2631413664).

Almost surely, 2^31365452121 is an apocalyptic number.

It is an amenable number.

31365452121 is a deficient number, since it is larger than the sum of its proper divisors (10737166503).

31365452121 is a wasteful number, since it uses less digits than its factorization.

31365452121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88240.

The product of its digits is 21600, while the sum is 33.

The spelling of 31365452121 in words is "thirty-one billion, three hundred sixty-five million, four hundred fifty-two thousand, one hundred twenty-one".