21301109775 has 36 divisors (see below), whose sum is σ = 41621082360. Its totient is φ = 10327809600.

The previous prime is 21301109771. The next prime is 21301109813. The reversal of 21301109775 is 57790110312.

It is not a de Polignac number, because 21301109775 - 2² = 21301109771 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21301109771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4300780 + ... + 4305729.

Almost surely, 2^21301109775 is an apocalyptic number.

21301109775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21301109775 is a deficient number, since it is larger than the sum of its proper divisors (20319972585).

21301109775 is a wasteful number, since it uses less digits than its factorization.

21301109775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8606536 (or 8606528 counting only the distinct ones).

The product of its (nonzero) digits is 13230, while the sum is 36.

The spelling of 21301109775 in words is "twenty-one billion, three hundred one million, one hundred nine thousand, seven hundred seventy-five".