21232211232 has 24 divisors (see below), whose sum is σ = 55734554736. Its totient is φ = 7077403712.

The previous prime is 21232211197. The next prime is 21232211263. The reversal of 21232211232 is 23211223212.

It is a tau number, because it is divible by the number of its divisors (24).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 21232211199 and 21232211208.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110584338 + ... + 110584529.

It is an arithmetic number, because the mean of its divisors is an integer number (2322273114).

Almost surely, 2^21232211232 is an apocalyptic number.

It is an amenable number.

21232211232 is an abundant number, since it is smaller than the sum of its proper divisors (34502343504).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21232211232 is a wasteful number, since it uses less digits than its factorization.

21232211232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221168880 (or 221168872 counting only the distinct ones).

The product of its digits is 576, while the sum is 21.

Adding to 21232211232 its reverse (23211223212), we get a palindrome (44443434444).

The spelling of 21232211232 in words is "twenty-one billion, two hundred thirty-two million, two hundred eleven thousand, two hundred thirty-two".