21230021022 has 32 divisors (see below), whose sum is σ = 51380220672. Its totient is φ = 5708913024.

The previous prime is 21230021011. The next prime is 21230021047. The reversal of 21230021022 is 22012003212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21230020992 and 21230021010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14866248 + ... + 14867675.

It is an arithmetic number, because the mean of its divisors is an integer number (1605631896).

Almost surely, 2^21230021022 is an apocalyptic number.

21230021022 is an abundant number, since it is smaller than the sum of its proper divisors (30150199650).

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

21230021022 is a wasteful number, since it uses less digits than its factorization.

21230021022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29733952.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 21230021022 its reverse (22012003212), we get a palindrome (43242024234).

The spelling of 21230021022 in words is "twenty-one billion, two hundred thirty million, twenty-one thousand, twenty-two".