31231120011 has 16 divisors (see below), whose sum is σ = 51251069184. Its totient is φ = 16473557664.

The previous prime is 31231119991. The next prime is 31231120013. The reversal of 31231120011 is 11002113213.

It is a happy number.

It is not a de Polignac number, because 31231120011 - 2¹⁰ = 31231118987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31231120013) 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, 57199581 + ... + 57200126.

It is an arithmetic number, because the mean of its divisors is an integer number (3203191824).

Almost surely, 2^31231120011 is an apocalyptic number.

31231120011 is a deficient number, since it is larger than the sum of its proper divisors (20019949173).

31231120011 is a wasteful number, since it uses less digits than its factorization.

31231120011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114399730.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 31231120011 its reverse (11002113213), we get a palindrome (42233233224).

The spelling of 31231120011 in words is "thirty-one billion, two hundred thirty-one million, one hundred twenty thousand, eleven".