21184641122 has 18 divisors (see below), whose sum is σ = 32126227329. Its totient is φ = 10477154200.

The previous prime is 21184641059. The next prime is 21184641161. The reversal of 21184641122 is 22114648112.

It can be written as a sum of positive squares in 2 ways, for example, as 14704230121 + 6480411001 = 121261^2 + 80501^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=102919.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 20789129 + ... + 20790147.

Almost surely, 2^21184641122 is an apocalyptic number.

21184641122 is a deficient number, since it is larger than the sum of its proper divisors (10941586207).

21184641122 is an frugal number, since it uses more digits than its factorization.

21184641122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2242 (or 1122 counting only the distinct ones).

The product of its digits is 6144, while the sum is 32.

Multiplying 21184641122 by its sum of digits (32), we get a square (677908515904 = 823352²).

The spelling of 21184641122 in words is "twenty-one billion, one hundred eighty-four million, six hundred forty-one thousand, one hundred twenty-two".