21355322105122 has 32 divisors (see below), whose sum is σ = 34174396087920. Its totient is φ = 9989209681920.

The previous prime is 21355322105059. The next prime is 21355322105177. The reversal of 21355322105122 is 22150122355312.

It can be written as a sum of positive squares in 8 ways, for example, as 20497884996681 + 857437108441 = 4527459^2 + 925979^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20128503 + ... + 21162874.

Almost surely, 2^{21355322105122} is an apocalyptic number.

21355322105122 is a deficient number, since it is larger than the sum of its proper divisors (12819073982798).

21355322105122 is a wasteful number, since it uses less digits than its factorization.

21355322105122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41291686.

The product of its (nonzero) digits is 36000, while the sum is 34.

The spelling of 21355322105122 in words is "twenty-one trillion, three hundred fifty-five billion, three hundred twenty-two million, one hundred five thousand, one hundred twenty-two".