1321312112022 has 32 divisors (see below), whose sum is σ = 3179096812800. Its totient is φ = 357648391008.

The previous prime is 1321312111981. The next prime is 1321312112089. The reversal of 1321312112022 is 2202112131231.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 1321312112022.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 827888997 + ... + 827890592.

It is an arithmetic number, because the mean of its divisors is an integer number (99346775400).

Almost surely, 2^{1321312112022} is an apocalyptic number.

1321312112022 is an abundant number, since it is smaller than the sum of its proper divisors (1857784700778).

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

1321312112022 is a wasteful number, since it uses less digits than its factorization.

1321312112022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1655779620.

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

Adding to 1321312112022 its reverse (2202112131231), we get a palindrome (3523424243253).

The spelling of 1321312112022 in words is "one trillion, three hundred twenty-one billion, three hundred twelve million, one hundred twelve thousand, twenty-two".