21155015116026 has 96 divisors (see below), whose sum is σ = 51543692718336. Its totient is φ = 6214334256000.

The previous prime is 21155015116007. The next prime is 21155015116069. The reversal of 21155015116026 is 62061151055112.

21155015116026 is a `hidden beast` number, since 2 + 1 + 1 + 550 + 15 + 11 + 60 + 26 = 666.

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, 3342445 + ... + 7313136.

It is an arithmetic number, because the mean of its divisors is an integer number (536913465816).

Almost surely, 2^{21155015116026} is an apocalyptic number.

21155015116026 is an abundant number, since it is smaller than the sum of its proper divisors (30388677602310).

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

21155015116026 is a wasteful number, since it uses less digits than its factorization.

21155015116026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10655908 (or 10655905 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 36.

The spelling of 21155015116026 in words is "twenty-one trillion, one hundred fifty-five billion, fifteen million, one hundred sixteen thousand, twenty-six".