21155014256327 has 12 divisors (see below), whose sum is σ = 24611675619600. Its totient is φ = 18130819847616.

The previous prime is 21155014256317. The next prime is 21155014256371. The reversal of 21155014256327 is 72365241055112.

It is not a de Polignac number, because 21155014256327 - 2¹⁴ = 21155014239943 is a prime.

It is a super-2 number, since 2×21155014256327² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21155014256317) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23960963 + ... + 24828164.

It is an arithmetic number, because the mean of its divisors is an integer number (2050972968300).

Almost surely, 2^{21155014256327} is an apocalyptic number.

21155014256327 is a deficient number, since it is larger than the sum of its proper divisors (3456661363273).

21155014256327 is an equidigital number, since it uses as much as digits as its factorization.

21155014256327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48797990 (or 48797983 counting only the distinct ones).

The product of its (nonzero) digits is 504000, while the sum is 44.

The spelling of 21155014256327 in words is "twenty-one trillion, one hundred fifty-five billion, fourteen million, two hundred fifty-six thousand, three hundred twenty-seven".