22721510612 has 12 divisors (see below), whose sum is σ = 40608657600. Its totient is φ = 11119037016.

The previous prime is 22721510611. The next prime is 22721510621. The reversal of 22721510612 is 21601512722.

It is a happy number.

It is a super-2 number, since 2×22721510612² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22721510611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60429362 + ... + 60429737.

It is an arithmetic number, because the mean of its divisors is an integer number (3384054800).

Almost surely, 2^22721510612 is an apocalyptic number.

It is an amenable number.

22721510612 is a deficient number, since it is larger than the sum of its proper divisors (17887146988).

22721510612 is a wasteful number, since it uses less digits than its factorization.

22721510612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120859150 (or 120859148 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 29.

The spelling of 22721510612 in words is "twenty-two billion, seven hundred twenty-one million, five hundred ten thousand, six hundred twelve".