31231320212011 has 8 divisors (see below), whose sum is σ = 32875129400400. Its totient is φ = 29587516572960.

The previous prime is 31231320211979. The next prime is 31231320212023. The reversal of 31231320212011 is 11021202313213.

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

It is a cyclic number.

It is not a de Polignac number, because 31231320212011 - 2⁵ = 31231320211979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31231320212311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15330201 + ... + 17247541.

It is an arithmetic number, because the mean of its divisors is an integer number (4109391175050).

Almost surely, 2^{31231320212011} is an apocalyptic number.

31231320212011 is a deficient number, since it is larger than the sum of its proper divisors (1643809188389).

31231320212011 is a wasteful number, since it uses less digits than its factorization.

31231320212011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2774669.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 31231320212011 its reverse (11021202313213), we get a palindrome (42252522525224).

The spelling of 31231320212011 in words is "thirty-one trillion, two hundred thirty-one billion, three hundred twenty million, two hundred twelve thousand, eleven".