21120223108 has 12 divisors (see below), whose sum is σ = 36961452892. Its totient is φ = 10559808000.

The previous prime is 21120223057. The next prime is 21120223109. The reversal of 21120223108 is 80132202112.

It can be written as a sum of positive squares in 2 ways, for example, as 4958694724 + 16161528384 = 70418^2 + 127128^2 .

It is not an unprimeable number, because it can be changed into a prime (21120223109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167116 + ... + 264892.

Almost surely, 2^21120223108 is an apocalyptic number.

It is an amenable number.

21120223108 is a deficient number, since it is larger than the sum of its proper divisors (15841229784).

21120223108 is a wasteful number, since it uses less digits than its factorization.

21120223108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151782 (or 151780 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The spelling of 21120223108 in words is "twenty-one billion, one hundred twenty million, two hundred twenty-three thousand, one hundred eight".