21022099975 has 6 divisors (see below), whose sum is σ = 26067404000. Its totient is φ = 16817679960.

The previous prime is 21022099963. The next prime is 21022099991. The reversal of 21022099975 is 57999022012.

It is not a de Polignac number, because 21022099975 - 2⁹ = 21022099463 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 420441975 + ... + 420442024.

Almost surely, 2^21022099975 is an apocalyptic number.

21022099975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21022099975 is a deficient number, since it is larger than the sum of its proper divisors (5045304025).

21022099975 is an equidigital number, since it uses as much as digits as its factorization.

21022099975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 840884009 (or 840884004 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 46.

The spelling of 21022099975 in words is "twenty-one billion, twenty-two million, ninety-nine thousand, nine hundred seventy-five".