31231222102011 has 16 divisors (see below), whose sum is σ = 44102308166784. Its totient is φ = 19591096001664.

The previous prime is 31231222101979. The next prime is 31231222102027. The reversal of 31231222102011 is 11020122213213.

It is not a de Polignac number, because 31231222102011 - 2⁵ = 31231222101979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31231222102061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77373685 + ... + 77776278.

It is an arithmetic number, because the mean of its divisors is an integer number (2756394260424).

Almost surely, 2^{31231222102011} is an apocalyptic number.

31231222102011 is a deficient number, since it is larger than the sum of its proper divisors (12871086064773).

31231222102011 is a wasteful number, since it uses less digits than its factorization.

31231222102011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155153930.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 31231222102011 its reverse (11020122213213), we get a palindrome (42251344315224).

The spelling of 31231222102011 in words is "thirty-one trillion, two hundred thirty-one billion, two hundred twenty-two million, one hundred two thousand, eleven".