22012001208172 has 12 divisors (see below), whose sum is σ = 38521195839616. Its totient is φ = 11005945254000.

The previous prime is 22012001208167. The next prime is 22012001208173. The reversal of 22012001208172 is 27180210021022.

It is a self number, because there is not a number n which added to its sum of digits gives 22012001208172.

It is not an unprimeable number, because it can be changed into a prime (22012001208173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12936204 + ... + 14538547.

Almost surely, 2^{22012001208172} is an apocalyptic number.

It is an amenable number.

22012001208172 is a deficient number, since it is larger than the sum of its proper divisors (16509194631444).

22012001208172 is a wasteful number, since it uses less digits than its factorization.

22012001208172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27675048 (or 27675046 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 28.

Adding to 22012001208172 its reverse (27180210021022), we get a palindrome (49192211229194).

The spelling of 22012001208172 in words is "twenty-two trillion, twelve billion, one million, two hundred eight thousand, one hundred seventy-two".