31212113122311 has 16 divisors (see below), whose sum is σ = 45599434800768. Its totient is φ = 18833099890400.

The previous prime is 31212113122297. The next prime is 31212113122313. The reversal of 31212113122311 is 11322131121213.

It is a cyclic number.

It is not a de Polignac number, because 31212113122311 - 2¹⁵ = 31212113089543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31212113122313) 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, 2083300020 + ... + 2083315001.

It is an arithmetic number, because the mean of its divisors is an integer number (2849964675048).

Almost surely, 2^{31212113122311} is an apocalyptic number.

31212113122311 is a deficient number, since it is larger than the sum of its proper divisors (14387321678457).

31212113122311 is a wasteful number, since it uses less digits than its factorization.

31212113122311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4166615262.

The product of its digits is 432, while the sum is 24.

Adding to 31212113122311 its reverse (11322131121213), we get a palindrome (42534244243524).

The spelling of 31212113122311 in words is "thirty-one trillion, two hundred twelve billion, one hundred thirteen million, one hundred twenty-two thousand, three hundred eleven".