21002210022 has 16 divisors (see below), whose sum is σ = 42192783360. Its totient is φ = 6969342792.

The previous prime is 21002210017. The next prime is 21002210039. The reversal of 21002210022 is 22001220012.

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, 7847022 + ... + 7849697.

It is an arithmetic number, because the mean of its divisors is an integer number (2637048960).

Almost surely, 2^21002210022 is an apocalyptic number.

21002210022 is an abundant number, since it is smaller than the sum of its proper divisors (21190573338).

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

21002210022 is a wasteful number, since it uses less digits than its factorization.

21002210022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15696947.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 21002210022 its reverse (22001220012), we get a palindrome (43003430034).

It can be divided in two parts, 2100 and 2210022, that added together give a palindrome (2212122).

The spelling of 21002210022 in words is "twenty-one billion, two million, two hundred ten thousand, twenty-two".