31231131202133 has 16 divisors (see below), whose sum is σ = 31743894370176. Its totient is φ = 30719753613120.

The previous prime is 31231131202079. The next prime is 31231131202147. The reversal of 31231131202133 is 33120213113213.

It is a cyclic number.

It is not a de Polignac number, because 31231131202133 - 2¹⁸ = 31231130939989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31231131201133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 309711560 + ... + 309812382.

It is an arithmetic number, because the mean of its divisors is an integer number (1983993398136).

Almost surely, 2^{31231131202133} is an apocalyptic number.

It is an amenable number.

31231131202133 is a deficient number, since it is larger than the sum of its proper divisors (512763168043).

31231131202133 is a wasteful number, since it uses less digits than its factorization.

31231131202133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107644.

The product of its (nonzero) digits is 1944, while the sum is 26.

Adding to 31231131202133 its reverse (33120213113213), we get a palindrome (64351344315346).

The spelling of 31231131202133 in words is "thirty-one trillion, two hundred thirty-one billion, one hundred thirty-one million, two hundred two thousand, one hundred thirty-three".