21020210022 has 48 divisors (see below), whose sum is σ = 48938024880. Its totient is φ = 6001615872.

The previous prime is 21020209981. The next prime is 21020210023. The reversal of 21020210022 is 22001202012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020210023) 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, 413758 + ... + 461774.

It is an arithmetic number, because the mean of its divisors is an integer number (1019542185).

Almost surely, 2^21020210022 is an apocalyptic number.

21020210022 is an abundant number, since it is smaller than the sum of its proper divisors (27917814858).

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

21020210022 is a wasteful number, since it uses less digits than its factorization.

21020210022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49525 (or 49518 counting only the distinct ones).

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

Adding to 21020210022 its reverse (22001202012), we get a palindrome (43021412034).

The spelling of 21020210022 in words is "twenty-one billion, twenty million, two hundred ten thousand, twenty-two".