21611121650514 has 112 divisors (see below), whose sum is σ = 53567839936800. Its totient is φ = 6481310618880.

The previous prime is 21611121650497. The next prime is 21611121650551. The reversal of 21611121650514 is 41505612111612.

21611121650514 is a `hidden beast` number, since 2 + 1 + 6 + 11 + 121 + 6 + 5 + 0 + 514 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 5390164 + ... + 8501535.

It is an arithmetic number, because the mean of its divisors is an integer number (478284285150).

Almost surely, 2^{21611121650514} is an apocalyptic number.

21611121650514 is an abundant number, since it is smaller than the sum of its proper divisors (31956718286286).

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

21611121650514 is a wasteful number, since it uses less digits than its factorization.

21611121650514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13891827 (or 13891812 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 36.

The spelling of 21611121650514 in words is "twenty-one trillion, six hundred eleven billion, one hundred twenty-one million, six hundred fifty thousand, five hundred fourteen".