31213111133203 has 16 divisors (see below), whose sum is σ = 32527045877760. Its totient is φ = 29915309844000.

The previous prime is 31213111133179. The next prime is 31213111133207. The reversal of 31213111133203 is 30233111131213.

It is a cyclic number.

It is not a de Polignac number, because 31213111133203 - 2²⁹ = 31212574262291 is a prime.

It is a super-2 number, since 2×31213111133203² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31213111133207) 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, 3378958 + ... + 8593228.

It is an arithmetic number, because the mean of its divisors is an integer number (2032940367360).

Almost surely, 2^{31213111133203} is an apocalyptic number.

31213111133203 is a deficient number, since it is larger than the sum of its proper divisors (1313934744557).

31213111133203 is a wasteful number, since it uses less digits than its factorization.

31213111133203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5215818.

The product of its (nonzero) digits is 972, while the sum is 25.

Adding to 31213111133203 its reverse (30233111131213), we get a palindrome (61446222264416).

The spelling of 31213111133203 in words is "thirty-one trillion, two hundred thirteen billion, one hundred eleven million, one hundred thirty-three thousand, two hundred three".