21150013126055 has 32 divisors (see below), whose sum is σ = 28488995880768. Its totient is φ = 14942182528000.

The previous prime is 21150013126051. The next prime is 21150013126057. The reversal of 21150013126055 is 55062131005112.

It is not a de Polignac number, because 21150013126055 - 2² = 21150013126051 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21150013126051) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35624294 + ... + 36213123.

It is an arithmetic number, because the mean of its divisors is an integer number (890281121274).

Almost surely, 2^{21150013126055} is an apocalyptic number.

21150013126055 is a deficient number, since it is larger than the sum of its proper divisors (7338982754713).

21150013126055 is a wasteful number, since it uses less digits than its factorization.

21150013126055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71837587.

The product of its (nonzero) digits is 9000, while the sum is 32.

The spelling of 21150013126055 in words is "twenty-one trillion, one hundred fifty billion, thirteen million, one hundred twenty-six thousand, fifty-five".