31123302133 has 12 divisors (see below), whose sum is σ = 39097041760. Its totient is φ = 24251923080.

The previous prime is 31123302131. The next prime is 31123302157. The reversal of 31123302133 is 33120332113.

It is not a de Polignac number, because 31123302133 - 2¹ = 31123302131 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31123302131) 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, 18371823 + ... + 18373516.

Almost surely, 2^31123302133 is an apocalyptic number.

It is an amenable number.

31123302133 is a deficient number, since it is larger than the sum of its proper divisors (7973739627).

31123302133 is a wasteful number, since it uses less digits than its factorization.

31123302133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36745368 (or 36745357 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 31123302133 its reverse (33120332113), we get a palindrome (64243634246).

The spelling of 31123302133 in words is "thirty-one billion, one hundred twenty-three million, three hundred two thousand, one hundred thirty-three".