31312211102031 has 8 divisors (see below), whose sum is σ = 43564815446400. Its totient is φ = 19967207079512.

The previous prime is 31312211101991. The next prime is 31312211102041. The reversal of 31312211102031 is 13020111221313.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31312211102031 is a prime.

It is a super-2 number, since 2×31312211102031² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31312211101989 and 31312211102007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31312211102041) 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 7 ways as a sum of consecutive naturals, for example, 226900080381 + ... + 226900080518.

It is an arithmetic number, because the mean of its divisors is an integer number (5445601930800).

Almost surely, 2^{31312211102031} is an apocalyptic number.

31312211102031 is a deficient number, since it is larger than the sum of its proper divisors (12252604344369).

31312211102031 is a wasteful number, since it uses less digits than its factorization.

31312211102031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453800160925.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 31312211102031 its reverse (13020111221313), we get a palindrome (44332322323344).

The spelling of 31312211102031 in words is "thirty-one trillion, three hundred twelve billion, two hundred eleven million, one hundred two thousand, thirty-one".