22021605206312 has 32 divisors (see below), whose sum is σ = 42270550456680. Its totient is φ = 10752445209600.

The previous prime is 22021605206303. The next prime is 22021605206323. The reversal of 22021605206312 is 21360250612022.

It can be written as a sum of positive squares in 4 ways, for example, as 20790006875236 + 1231598331076 = 4559606^2 + 1109774^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186615413 + ... + 186733380.

Almost surely, 2^{22021605206312} is an apocalyptic number.

It is an amenable number.

22021605206312 is a deficient number, since it is larger than the sum of its proper divisors (20248945250368).

22021605206312 is a wasteful number, since it uses less digits than its factorization.

22021605206312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373348973 (or 373348969 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

Adding to 22021605206312 its reverse (21360250612022), we get a palindrome (43381855818334).

The spelling of 22021605206312 in words is "twenty-two trillion, twenty-one billion, six hundred five million, two hundred six thousand, three hundred twelve".