21232170022 has 16 divisors (see below), whose sum is σ = 36433960992. Its totient is φ = 9090512640.

The previous prime is 21232169999. The next prime is 21232170023. The reversal of 21232170022 is 22007123212.

It is a junction number, because it is equal to n+sod(n) for n = 21232169975 and 21232170002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21232170023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 734379 + ... + 762742.

It is an arithmetic number, because the mean of its divisors is an integer number (2277122562).

Almost surely, 2^21232170022 is an apocalyptic number.

21232170022 is a deficient number, since it is larger than the sum of its proper divisors (15201790970).

21232170022 is a wasteful number, since it uses less digits than its factorization.

21232170022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1498143.

The product of its (nonzero) digits is 672, while the sum is 22.

Adding to 21232170022 its reverse (22007123212), we get a palindrome (43239293234).

The spelling of 21232170022 in words is "twenty-one billion, two hundred thirty-two million, one hundred seventy thousand, twenty-two".