21221123321232 has 80 divisors (see below), whose sum is σ = 60973580615680. Its totient is φ = 7066612637568.

The previous prime is 21221123321179. The next prime is 21221123321309. The reversal of 21221123321232 is 23212332112212.

21221123321232 is a `hidden beast` number, since 2 + 1 + 2 + 211 + 233 + 212 + 3 + 2 = 666.

21221123321232 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 = 21221123321196 and 21221123321205.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24204688 + ... + 25066095.

It is an arithmetic number, because the mean of its divisors is an integer number (762169757696).

Almost surely, 2^{21221123321232} is an apocalyptic number.

It is an amenable number.

21221123321232 is an abundant number, since it is smaller than the sum of its proper divisors (39752457294448).

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

21221123321232 is a wasteful number, since it uses less digits than its factorization.

21221123321232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49271797 (or 49271785 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

Adding to 21221123321232 its reverse (23212332112212), we get a palindrome (44433455433444).

The spelling of 21221123321232 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred twenty-three million, three hundred twenty-one thousand, two hundred thirty-two".