21161161706022 has 96 divisors (see below), whose sum is σ = 49486370169600. Its totient is φ = 6496582219776.

The previous prime is 21161161705963. The next prime is 21161161706039. The reversal of 21161161706022 is 22060716116112.

21161161706022 is a `hidden beast` number, since 2 + 1 + 1 + 6 + 11 + 617 + 0 + 6 + 0 + 22 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1381900638 + ... + 1381915950.

It is an arithmetic number, because the mean of its divisors is an integer number (515483022600).

Almost surely, 2^{21161161706022} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21161161706022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24743185084800).

21161161706022 is an abundant number, since it is smaller than the sum of its proper divisors (28325208463578).

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

21161161706022 is a wasteful number, since it uses less digits than its factorization.

21161161706022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28142 (or 28139 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The spelling of 21161161706022 in words is "twenty-one trillion, one hundred sixty-one billion, one hundred sixty-one million, seven hundred six thousand, twenty-two".