21301541055 has 32 divisors (see below), whose sum is σ = 38402795520. Its totient is φ = 11200805280.

The previous prime is 21301540993. The next prime is 21301541153. The reversal of 21301541055 is 55014510312.

It is not a de Polignac number, because 21301541055 - 2¹⁰ = 21301540031 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1101607 + ... + 1120776.

It is an arithmetic number, because the mean of its divisors is an integer number (1200087360).

Almost surely, 2^21301541055 is an apocalyptic number.

21301541055 is a deficient number, since it is larger than the sum of its proper divisors (17101254465).

21301541055 is a wasteful number, since it uses less digits than its factorization.

21301541055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2222468 (or 2222462 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The spelling of 21301541055 in words is "twenty-one billion, three hundred one million, five hundred forty-one thousand, fifty-five".