31312101111223 has 16 divisors (see below), whose sum is σ = 31596571238400. Its totient is φ = 31028912442720.

The previous prime is 31312101111143. The next prime is 31312101111257. The reversal of 31312101111223 is 32211110121313.

It is a cyclic number.

It is not a de Polignac number, because 31312101111223 - 2²¹ = 31312099014071 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31312101111194 and 31312101111203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31312101115223) 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, 546592540 + ... + 546649822.

It is an arithmetic number, because the mean of its divisors is an integer number (1974785702400).

Almost surely, 2^{31312101111223} is an apocalyptic number.

31312101111223 is a deficient number, since it is larger than the sum of its proper divisors (284470127177).

31312101111223 is a wasteful number, since it uses less digits than its factorization.

31312101111223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68382.

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 31312101111223 its reverse (32211110121313), we get a palindrome (63523211232536).

The spelling of 31312101111223 in words is "thirty-one trillion, three hundred twelve billion, one hundred one million, one hundred eleven thousand, two hundred twenty-three".