21232221875 has 12 divisors (see below), whose sum is σ = 26538582672. Its totient is φ = 16985775000.

The previous prime is 21232221809. The next prime is 21232221883. The reversal of 21232221875 is 57812223212.

It is not a de Polignac number, because 21232221875 - 2³⁴ = 4052352691 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3394031 + ... + 3400280.

It is an arithmetic number, because the mean of its divisors is an integer number (2211548556).

Almost surely, 2^21232221875 is an apocalyptic number.

21232221875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21232221875 is a deficient number, since it is larger than the sum of its proper divisors (5306360797).

21232221875 is an frugal number, since it uses more digits than its factorization.

21232221875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6794336 (or 6794316 counting only the distinct ones).

The product of its digits is 26880, while the sum is 35.

The spelling of 21232221875 in words is "twenty-one billion, two hundred thirty-two million, two hundred twenty-one thousand, eight hundred seventy-five".