31311021130133 has 16 divisors (see below), whose sum is σ = 32096993955840. Its totient is φ = 30530243687856.

The previous prime is 31311021130121. The next prime is 31311021130139. The reversal of 31311021130133 is 33103112011313.

It is a cyclic number.

It is not a de Polignac number, because 31311021130133 - 2⁴ = 31311021130117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31311021130099 and 31311021130108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31311021130139) 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, 12981416 + ... + 15203262.

It is an arithmetic number, because the mean of its divisors is an integer number (2006062122240).

Almost surely, 2^{31311021130133} is an apocalyptic number.

It is an amenable number.

31311021130133 is a deficient number, since it is larger than the sum of its proper divisors (785972825707).

31311021130133 is a wasteful number, since it uses less digits than its factorization.

31311021130133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2223016.

The product of its (nonzero) digits is 486, while the sum is 23.

Adding to 31311021130133 its reverse (33103112011313), we get a palindrome (64414133141446).

The spelling of 31311021130133 in words is "thirty-one trillion, three hundred eleven billion, twenty-one million, one hundred thirty thousand, one hundred thirty-three".