31103212133 has 16 divisors (see below), whose sum is σ = 37720719360. Its totient is φ = 25068546096.

The previous prime is 31103212111. The next prime is 31103212177. The reversal of 31103212133 is 33121230113.

It is a cyclic number.

It is not a de Polignac number, because 31103212133 - 2⁸ = 31103211877 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 (31103212183) 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, 1627685 + ... + 1646682.

It is an arithmetic number, because the mean of its divisors is an integer number (2357544960).

Almost surely, 2^31103212133 is an apocalyptic number.

It is an amenable number.

31103212133 is a deficient number, since it is larger than the sum of its proper divisors (6617507227).

31103212133 is a wasteful number, since it uses less digits than its factorization.

31103212133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3274456.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 31103212133 its reverse (33121230113), we get a palindrome (64224442246).

The spelling of 31103212133 in words is "thirty-one billion, one hundred three million, two hundred twelve thousand, one hundred thirty-three".