21223310022 has 24 divisors (see below), whose sum is σ = 46288373040. Its totient is φ = 7027585200.

The previous prime is 21223310011. The next prime is 21223310057. The reversal of 21223310022 is 22001332212.

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

It is a junction number, because it is equal to n+sod(n) for n = 21223309977 and 21223310004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3901497 + ... + 3906932.

It is an arithmetic number, because the mean of its divisors is an integer number (1928682210).

Almost surely, 2^21223310022 is an apocalyptic number.

21223310022 is an abundant number, since it is smaller than the sum of its proper divisors (25065063018).

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

21223310022 is a wasteful number, since it uses less digits than its factorization.

21223310022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7808588 (or 7808585 counting only the distinct ones).

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

Adding to 21223310022 its reverse (22001332212), we get a palindrome (43224642234).

The spelling of 21223310022 in words is "twenty-one billion, two hundred twenty-three million, three hundred ten thousand, twenty-two".