21369817122 has 16 divisors (see below), whose sum is σ = 45253730592. Its totient is φ = 6704256320.

The previous prime is 21369817103. The next prime is 21369817151. The reversal of 21369817122 is 22171896312.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 104753904 + ... + 104754107.

It is an arithmetic number, because the mean of its divisors is an integer number (2828358162).

Almost surely, 2^21369817122 is an apocalyptic number.

21369817122 is an abundant number, since it is smaller than the sum of its proper divisors (23883913470).

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

21369817122 is a wasteful number, since it uses less digits than its factorization.

21369817122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209508033.

The product of its digits is 72576, while the sum is 42.

The spelling of 21369817122 in words is "twenty-one billion, three hundred sixty-nine million, eight hundred seventeen thousand, one hundred twenty-two".