31311121212133 has 24 divisors (see below), whose sum is σ = 38509048015200. Its totient is φ = 25313565015648.

The previous prime is 31311121212109. The next prime is 31311121212191. The reversal of 31311121212133 is 33121212111313.

It is not a de Polignac number, because 31311121212133 - 2⁵ = 31311121212101 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31311121212098 and 31311121212107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31311121212193) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 73867318 + ... + 74289991.

It is an arithmetic number, because the mean of its divisors is an integer number (1604543667300).

Almost surely, 2^{31311121212133} is an apocalyptic number.

It is an amenable number.

31311121212133 is a deficient number, since it is larger than the sum of its proper divisors (7197926803067).

31311121212133 is a wasteful number, since it uses less digits than its factorization.

31311121212133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148157569 (or 148157562 counting only the distinct ones).

The product of its digits is 648, while the sum is 25.

Adding to 31311121212133 its reverse (33121212111313), we get a palindrome (64432333323446).

The spelling of 31311121212133 in words is "thirty-one trillion, three hundred eleven billion, one hundred twenty-one million, two hundred twelve thousand, one hundred thirty-three".