21020010222 has 32 divisors (see below), whose sum is σ = 42725816064. Its totient is φ = 6892804800.

The previous prime is 21020010203. The next prime is 21020010223. The reversal of 21020010222 is 22201002012.

It is a junction number, because it is equal to n+sod(n) for n = 21020010198 and 21020010207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020010223) 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, 140697 + ... + 248667.

It is an arithmetic number, because the mean of its divisors is an integer number (1335181752).

Almost surely, 2^21020010222 is an apocalyptic number.

21020010222 is an abundant number, since it is smaller than the sum of its proper divisors (21705805842).

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

21020010222 is a wasteful number, since it uses less digits than its factorization.

21020010222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108504.

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

Adding to 21020010222 its reverse (22201002012), we get a palindrome (43221012234).

The spelling of 21020010222 in words is "twenty-one billion, twenty million, ten thousand, two hundred twenty-two".