21115760271575 has 12 divisors (see below), whose sum is σ = 26183603380968. Its totient is φ = 16892569092000.

The previous prime is 21115760271539. The next prime is 21115760271589. The reversal of 21115760271575 is 57517206751112.

It is not a de Polignac number, because 21115760271575 - 2¹⁸ = 21115760009431 is a prime.

It is a Duffinian number.

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 11 ways as a sum of consecutive naturals, for example, 15426044 + ... + 16739006.

It is an arithmetic number, because the mean of its divisors is an integer number (2181966948414).

Almost surely, 2^{21115760271575} is an apocalyptic number.

21115760271575 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21115760271575 is a deficient number, since it is larger than the sum of its proper divisors (5067843109393).

21115760271575 is a wasteful number, since it uses less digits than its factorization.

21115760271575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1956274 (or 1956269 counting only the distinct ones).

The product of its (nonzero) digits is 1029000, while the sum is 50.

The spelling of 21115760271575 in words is "twenty-one trillion, one hundred fifteen billion, seven hundred sixty million, two hundred seventy-one thousand, five hundred seventy-five".