21611122103754 has 24 divisors (see below), whose sum is σ = 48438721957860. Its totient is φ = 6955303665408.

The previous prime is 21611122103749. The next prime is 21611122103761. The reversal of 21611122103754 is 45730122111612.

21611122103754 is a `hidden beast` number, since 2 + 1 + 61 + 1 + 1 + 221 + 0 + 375 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 21252053900025 + 359068203729 = 4609995^2 + 599223^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20700308007 + ... + 20700309050.

Almost surely, 2^{21611122103754} is an apocalyptic number.

21611122103754 is an abundant number, since it is smaller than the sum of its proper divisors (26827599854106).

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

21611122103754 is a wasteful number, since it uses less digits than its factorization.

21611122103754 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41400617094 (or 41400617091 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The spelling of 21611122103754 in words is "twenty-one trillion, six hundred eleven billion, one hundred twenty-two million, one hundred three thousand, seven hundred fifty-four".