21166224412 has 24 divisors (see below), whose sum is σ = 37378800704. Its totient is φ = 10486936512.

The previous prime is 21166224281. The next prime is 21166224433. The reversal of 21166224412 is 21442266112.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 184558 + ... + 276394.

Almost surely, 2^21166224412 is an apocalyptic number.

It is an amenable number.

21166224412 is a deficient number, since it is larger than the sum of its proper divisors (16212576292).

21166224412 is a wasteful number, since it uses less digits than its factorization.

21166224412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92365 (or 92363 counting only the distinct ones).

The product of its digits is 9216, while the sum is 31.

The spelling of 21166224412 in words is "twenty-one billion, one hundred sixty-six million, two hundred twenty-four thousand, four hundred twelve".