21150216266156 has 12 divisors (see below), whose sum is σ = 37012947888168. Its totient is φ = 10575088298112.

The previous prime is 21150216266093. The next prime is 21150216266171. The reversal of 21150216266156 is 65166261205112.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2414501 + ... + 6937596.

It is an arithmetic number, because the mean of its divisors is an integer number (3084412324014).

Almost surely, 2^{21150216266156} is an apocalyptic number.

It is an amenable number.

21150216266156 is a deficient number, since it is larger than the sum of its proper divisors (15862731622012).

21150216266156 is a wasteful number, since it uses less digits than its factorization.

21150216266156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9917488 (or 9917486 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 44.

The spelling of 21150216266156 in words is "twenty-one trillion, one hundred fifty billion, two hundred sixteen million, two hundred sixty-six thousand, one hundred fifty-six".