21154506360122 has 32 divisors (see below), whose sum is σ = 33984036369360. Its totient is φ = 9840833474560.

The previous prime is 21154506360107. The next prime is 21154506360131. The reversal of 21154506360122 is 22106360545112.

It can be written as a sum of positive squares in 8 ways, for example, as 7525480914121 + 13629025446001 = 2743261^2 + 3691751^2 .

It is a super-3 number, since 3×21154506360122³ (a number of 41 digits) contains 333 as substring.

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, 11738222 + ... + 13419942.

Almost surely, 2^{21154506360122} is an apocalyptic number.

21154506360122 is a deficient number, since it is larger than the sum of its proper divisors (12829530009238).

21154506360122 is a wasteful number, since it uses less digits than its factorization.

21154506360122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1685986.

The product of its (nonzero) digits is 86400, while the sum is 38.

The spelling of 21154506360122 in words is "twenty-one trillion, one hundred fifty-four billion, five hundred six million, three hundred sixty thousand, one hundred twenty-two".