21899879236122 has 16 divisors (see below), whose sum is σ = 44089823099712. Its totient is φ = 7251615640800.

The previous prime is 21899879236121. The next prime is 21899879236129. The reversal of 21899879236122 is 22163297899812.

It is not an unprimeable number, because it can be changed into a prime (21899879236121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12086025163 + ... + 12086026974.

It is an arithmetic number, because the mean of its divisors is an integer number (2755613943732).

Almost surely, 2^{21899879236122} is an apocalyptic number.

21899879236122 is an abundant number, since it is smaller than the sum of its proper divisors (22189943863590).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21899879236122 is a wasteful number, since it uses less digits than its factorization.

21899879236122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24172052293.

The product of its digits is 94058496, while the sum is 69.

The spelling of 21899879236122 in words is "twenty-one trillion, eight hundred ninety-nine billion, eight hundred seventy-nine million, two hundred thirty-six thousand, one hundred twenty-two".