21001022202 has 32 divisors (see below), whose sum is σ = 44603968320. Its totient is φ = 6573208320.

The previous prime is 21001022071. The next prime is 21001022209. The reversal of 21001022202 is 20222010012.

It is not an unprimeable number, because it can be changed into a prime (21001022209) 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, 802249 + ... + 828012.

It is an arithmetic number, because the mean of its divisors is an integer number (1393874010).

Almost surely, 2^21001022202 is an apocalyptic number.

21001022202 is an abundant number, since it is smaller than the sum of its proper divisors (23602946118).

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

21001022202 is a wasteful number, since it uses less digits than its factorization.

21001022202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1630398.

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

Adding to 21001022202 its reverse (20222010012), we get a palindrome (41223032214).

The spelling of 21001022202 in words is "twenty-one billion, one million, twenty-two thousand, two hundred two".