21416642565122 has 16 divisors (see below), whose sum is σ = 37156584693312. Its totient is φ = 9067976025360.

The previous prime is 21416642565119. The next prime is 21416642565151. The reversal of 21416642565122 is 22156524661412.

It is an unprimeable number.

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, 9215421629 + ... + 9215423952.

It is an arithmetic number, because the mean of its divisors is an integer number (2322286543332).

Almost surely, 2^{21416642565122} is an apocalyptic number.

21416642565122 is a deficient number, since it is larger than the sum of its proper divisors (15739942128190).

21416642565122 is a wasteful number, since it uses less digits than its factorization.

21416642565122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18430845673.

The product of its digits is 1382400, while the sum is 47.

The spelling of 21416642565122 in words is "twenty-one trillion, four hundred sixteen billion, six hundred forty-two million, five hundred sixty-five thousand, one hundred twenty-two".