31110313220113 has 4 divisors (see below), whose sum is σ = 31337395798500. Its totient is φ = 30883230641728.

The previous prime is 31110313220111. The next prime is 31110313220123. The reversal of 31110313220113 is 31102231301113.

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

It can be written as a sum of positive squares in 2 ways, for example, as 19762496923009 + 11347816297104 = 4445503^2 + 3368652^2 .

It is a cyclic number.

It is not a de Polignac number, because 31110313220113 - 2¹ = 31110313220111 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31110313220111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113541288988 + ... + 113541289261.

It is an arithmetic number, because the mean of its divisors is an integer number (7834348949625).

Almost surely, 2^{31110313220113} is an apocalyptic number.

It is an amenable number.

31110313220113 is a deficient number, since it is larger than the sum of its proper divisors (227082578387).

31110313220113 is a wasteful number, since it uses less digits than its factorization.

31110313220113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227082578386.

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 31110313220113 its reverse (31102231301113), we get a palindrome (62212544521226).

The spelling of 31110313220113 in words is "thirty-one trillion, one hundred ten billion, three hundred thirteen million, two hundred twenty thousand, one hundred thirteen".