21133616116 has 6 divisors (see below), whose sum is σ = 36983828210. Its totient is φ = 10566808056.

The previous prime is 21133616093. The next prime is 21133616131. The reversal of 21133616116 is 61161633112.

It can be written as a sum of positive squares in only one way, i.e., 21065619600 + 67996516 = 145140^2 + 8246^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2641702011 + ... + 2641702018.

Almost surely, 2^21133616116 is an apocalyptic number.

It is an amenable number.

21133616116 is a deficient number, since it is larger than the sum of its proper divisors (15850212094).

21133616116 is a wasteful number, since it uses less digits than its factorization.

21133616116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5283404033 (or 5283404031 counting only the distinct ones).

The product of its digits is 3888, while the sum is 31.

The spelling of 21133616116 in words is "twenty-one billion, one hundred thirty-three million, six hundred sixteen thousand, one hundred sixteen".