31131231311122 has 16 divisors (see below), whose sum is σ = 46829840299200. Its totient is φ = 15521289950160.

The previous prime is 31131231311113. The next prime is 31131231311129. The reversal of 31131231311122 is 22111313213113.

It is not an unprimeable number, because it can be changed into a prime (31131231311129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10246129 + ... + 12932347.

It is an arithmetic number, because the mean of its divisors is an integer number (2926865018700).

Almost surely, 2^{31131231311122} is an apocalyptic number.

31131231311122 is a deficient number, since it is larger than the sum of its proper divisors (15698608988078).

31131231311122 is a wasteful number, since it uses less digits than its factorization.

31131231311122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2702721.

The product of its digits is 648, while the sum is 25.

Adding to 31131231311122 its reverse (22111313213113), we get a palindrome (53242544524235).

The spelling of 31131231311122 in words is "thirty-one trillion, one hundred thirty-one billion, two hundred thirty-one million, three hundred eleven thousand, one hundred twenty-two".