31222011144 has 16 divisors (see below), whose sum is σ = 78055027920. Its totient is φ = 10407337040.

The previous prime is 31222011137. The next prime is 31222011199. The reversal of 31222011144 is 44111022213.

It is a self number, because there is not a number n which added to its sum of digits gives 31222011144.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 650458542 + ... + 650458589.

It is an arithmetic number, because the mean of its divisors is an integer number (4878439245).

Almost surely, 2^31222011144 is an apocalyptic number.

It is an amenable number.

31222011144 is an abundant number, since it is smaller than the sum of its proper divisors (46833016776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31222011144 is a wasteful number, since it uses less digits than its factorization.

31222011144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1300917140 (or 1300917136 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 31222011144 its reverse (44111022213), we get a palindrome (75333033357).

The spelling of 31222011144 in words is "thirty-one billion, two hundred twenty-two million, eleven thousand, one hundred forty-four".