21122222123012 has 12 divisors (see below), whose sum is σ = 36968989344000. Its totient is φ = 10559653739016.

The previous prime is 21122222122999. The next prime is 21122222123033. The reversal of 21122222123012 is 21032122222112.

It is a super-2 number, since 2×21122222123012² (a number of 27 digits) contains 22 as substring.

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, 364298012 + ... + 364355987.

It is an arithmetic number, because the mean of its divisors is an integer number (3080749112000).

Almost surely, 2^{21122222123012} is an apocalyptic number.

It is an amenable number.

21122222123012 is a deficient number, since it is larger than the sum of its proper divisors (15846767220988).

21122222123012 is a wasteful number, since it uses less digits than its factorization.

21122222123012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728661250 (or 728661248 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 21122222123012 its reverse (21032122222112), we get a palindrome (42154344345124).

The spelling of 21122222123012 in words is "twenty-one trillion, one hundred twenty-two billion, two hundred twenty-two million, one hundred twenty-three thousand, twelve".