22021002210 has 64 divisors (see below), whose sum is σ = 54635802624. Its totient is φ = 5674449600.

The previous prime is 22021002209. The next prime is 22021002253. The reversal of 22021002210 is 1220012022.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 625497 + ... + 659763.

It is an arithmetic number, because the mean of its divisors is an integer number (853684416).

Almost surely, 2^22021002210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22021002210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27317901312).

22021002210 is an abundant number, since it is smaller than the sum of its proper divisors (32614800414).

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

22021002210 is a wasteful number, since it uses less digits than its factorization.

22021002210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34999.

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

Adding to 22021002210 its reverse (1220012022), we get a palindrome (23241014232).

The spelling of 22021002210 in words is "twenty-two billion, twenty-one million, two thousand, two hundred ten".