31120210113213 has 16 divisors (see below), whose sum is σ = 45528551228160. Its totient is φ = 18789560821824.

The previous prime is 31120210113199. The next prime is 31120210113217. The reversal of 31120210113213 is 31231101202113.

It is not a de Polignac number, because 31120210113213 - 2¹⁸ = 31120209851069 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31120210113213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31120210113217) 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, 7527866853 + ... + 7527870986.

It is an arithmetic number, because the mean of its divisors is an integer number (2845534451760).

Almost surely, 2^{31120210113213} is an apocalyptic number.

It is an amenable number.

31120210113213 is a deficient number, since it is larger than the sum of its proper divisors (14408341114947).

31120210113213 is a wasteful number, since it uses less digits than its factorization.

31120210113213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15055737908.

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

Adding to 31120210113213 its reverse (31231101202113), we get a palindrome (62351311315326).

The spelling of 31120210113213 in words is "thirty-one trillion, one hundred twenty billion, two hundred ten million, one hundred thirteen thousand, two hundred thirteen".