21020201022 has 32 divisors (see below), whose sum is σ = 44014078080. Its totient is φ = 6683610080.

The previous prime is 21020200961. The next prime is 21020201023. The reversal of 21020201022 is 22010202012.

It is a junction number, because it is equal to n+sod(n) for n = 21020200989 and 21020201007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020201023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 713304 + ... + 742187.

It is an arithmetic number, because the mean of its divisors is an integer number (1375439940).

Almost surely, 2^21020201022 is an apocalyptic number.

21020201022 is an abundant number, since it is smaller than the sum of its proper divisors (22993877058).

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

21020201022 is a wasteful number, since it uses less digits than its factorization.

21020201022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1455608.

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

Adding to 21020201022 its reverse (22010202012), we get a palindrome (43030403034).

The spelling of 21020201022 in words is "twenty-one billion, twenty million, two hundred one thousand, twenty-two".