22121023312 has 20 divisors (see below), whose sum is σ = 43252692340. Its totient is φ = 10959038208.

The previous prime is 22121023297. The next prime is 22121023321. The reversal of 22121023312 is 21332012122.

It can be written as a sum of positive squares in 2 ways, for example, as 10894349376 + 11226673936 = 104376^2 + 105956^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 22121023312.

It is a congruent number.

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, 6340293 + ... + 6343780.

It is an arithmetic number, because the mean of its divisors is an integer number (2162634617).

Almost surely, 2^22121023312 is an apocalyptic number.

It is an amenable number.

22121023312 is a deficient number, since it is larger than the sum of its proper divisors (21131669028).

22121023312 is a wasteful number, since it uses less digits than its factorization.

22121023312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12684190 (or 12684184 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 22121023312 its reverse (21332012122), we get a palindrome (43453035434).

The spelling of 22121023312 in words is "twenty-two billion, one hundred twenty-one million, twenty-three thousand, three hundred twelve".