21230322210 has 64 divisors (see below), whose sum is σ = 57174802560. Its totient is φ = 5605358400.

The previous prime is 21230322203. The next prime is 21230322263. The reversal of 21230322210 is 1222303212.

It is a super-2 number, since 2×21230322210² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 361992 + ... + 416531.

It is an arithmetic number, because the mean of its divisors is an integer number (893356290).

Almost surely, 2^21230322210 is an apocalyptic number.

21230322210 is an abundant number, since it is smaller than the sum of its proper divisors (35944480350).

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

21230322210 is a wasteful number, since it uses less digits than its factorization.

21230322210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778640 (or 778634 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21230322210 its reverse (1222303212), we get a palindrome (22452625422).

The spelling of 21230322210 in words is "twenty-one billion, two hundred thirty million, three hundred twenty-two thousand, two hundred ten".