31113133102231 has 4 divisors (see below), whose sum is σ = 31113148605264. Its totient is φ = 31113117599200.

The previous prime is 31113133102187. The next prime is 31113133102279. The reversal of 31113133102231 is 13220133131113.

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

It is a cyclic number.

It is not a de Polignac number, because 31113133102231 - 2¹³ = 31113133094039 is a prime.

It is a super-2 number, since 2×31113133102231² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31113133102196 and 31113133102205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31113133105231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4198210 + ... + 8935951.

It is an arithmetic number, because the mean of its divisors is an integer number (7778287151316).

Almost surely, 2^{31113133102231} is an apocalyptic number.

31113133102231 is a deficient number, since it is larger than the sum of its proper divisors (15503033).

31113133102231 is a wasteful number, since it uses less digits than its factorization.

31113133102231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15503032.

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

Adding to 31113133102231 its reverse (13220133131113), we get a palindrome (44333266233344).

The spelling of 31113133102231 in words is "thirty-one trillion, one hundred thirteen billion, one hundred thirty-three million, one hundred two thousand, two hundred thirty-one".