21323011022 has 16 divisors (see below), whose sum is σ = 35648378640. Its totient is φ = 9506233728.

The previous prime is 21323011019. The next prime is 21323011043. The reversal of 21323011022 is 22011032312.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16503233 + ... + 16504524.

It is an arithmetic number, because the mean of its divisors is an integer number (2228023665).

Almost surely, 2^21323011022 is an apocalyptic number.

21323011022 is a deficient number, since it is larger than the sum of its proper divisors (14325367618).

21323011022 is a wasteful number, since it uses less digits than its factorization.

21323011022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33007795.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21323011022 its reverse (22011032312), we get a palindrome (43334043334).

The spelling of 21323011022 in words is "twenty-one billion, three hundred twenty-three million, eleven thousand, twenty-two".