31001122133 has 16 divisors (see below), whose sum is σ = 33140073600. Its totient is φ = 28914096960.

The previous prime is 31001122129. The next prime is 31001122181. The reversal of 31001122133 is 33122110013.

It is a cyclic number.

It is not a de Polignac number, because 31001122133 - 2² = 31001122129 is a prime.

It is a super-2 number, since 2×31001122133² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31001122333) 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, 940235 + ... + 972647.

It is an arithmetic number, because the mean of its divisors is an integer number (2071254600).

Almost surely, 2^31001122133 is an apocalyptic number.

It is an amenable number.

31001122133 is a deficient number, since it is larger than the sum of its proper divisors (2138951467).

31001122133 is a wasteful number, since it uses less digits than its factorization.

31001122133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33212.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 31001122133 its reverse (33122110013), we get a palindrome (64123232146).

The spelling of 31001122133 in words is "thirty-one billion, one million, one hundred twenty-two thousand, one hundred thirty-three".