31310021031133 has 4 divisors (see below), whose sum is σ = 33718484187388. Its totient is φ = 28901557874880.

The previous prime is 31310021031109. The next prime is 31310021031227. The reversal of 31310021031133 is 33113012001313.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17175744675769 + 14134276355364 = 4144363^2 + 3759558^2 .

It is a cyclic number.

It is not a de Polignac number, because 31310021031133 - 2⁵ = 31310021031101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31310021031433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1204231578108 + ... + 1204231578133.

It is an arithmetic number, because the mean of its divisors is an integer number (8429621046847).

Almost surely, 2^{31310021031133} is an apocalyptic number.

It is an amenable number.

31310021031133 is a deficient number, since it is larger than the sum of its proper divisors (2408463156255).

31310021031133 is a wasteful number, since it uses less digits than its factorization.

31310021031133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2408463156254.

The product of its (nonzero) digits is 486, while the sum is 22.

Adding to 31310021031133 its reverse (33113012001313), we get a palindrome (64423033032446).

The spelling of 31310021031133 in words is "thirty-one trillion, three hundred ten billion, twenty-one million, thirty-one thousand, one hundred thirty-three".