21223131330 has 32 divisors (see below), whose sum is σ = 53931723264. Its totient is φ = 5326589696.

The previous prime is 21223131301. The next prime is 21223131337. The reversal of 21223131330 is 3313132212.

It is a junction number, because it is equal to n+sod(n) for n = 21223131297 and 21223131306.

It is not an unprimeable number, because it can be changed into a prime (21223131337) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20806482 + ... + 20807501.

It is an arithmetic number, because the mean of its divisors is an integer number (1685366352).

Almost surely, 2^21223131330 is an apocalyptic number.

21223131330 is an abundant number, since it is smaller than the sum of its proper divisors (32708591934).

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

21223131330 is a wasteful number, since it uses less digits than its factorization.

21223131330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41614010.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21223131330 its reverse (3313132212), we get a palindrome (24536263542).

The spelling of 21223131330 in words is "twenty-one billion, two hundred twenty-three million, one hundred thirty-one thousand, three hundred thirty".