21022233213 has 24 divisors (see below), whose sum is σ = 29600993376. Its totient is φ = 13268916000.

The previous prime is 21022233209. The next prime is 21022233229. The reversal of 21022233213 is 31233222012.

It is a happy number.

It is not a de Polignac number, because 21022233213 - 2² = 21022233209 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21022233213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21022233203) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2053678 + ... + 2063888.

It is an arithmetic number, because the mean of its divisors is an integer number (1233374724).

Almost surely, 2^21022233213 is an apocalyptic number.

It is an amenable number.

21022233213 is a deficient number, since it is larger than the sum of its proper divisors (8578760163).

21022233213 is a wasteful number, since it uses less digits than its factorization.

21022233213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12153 (or 12134 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21022233213 its reverse (31233222012), we get a palindrome (52255455225).

The spelling of 21022233213 in words is "twenty-one billion, twenty-two million, two hundred thirty-three thousand, two hundred thirteen".