21001122202 has 16 divisors (see below), whose sum is σ = 31655800512. Its totient is φ = 10449310720.

The previous prime is 21001122179. The next prime is 21001122223. The reversal of 21001122202 is 20222110012.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 319002 + ... + 379162.

It is an arithmetic number, because the mean of its divisors is an integer number (1978487532).

Almost surely, 2^21001122202 is an apocalyptic number.

21001122202 is a deficient number, since it is larger than the sum of its proper divisors (10654678310).

21001122202 is a wasteful number, since it uses less digits than its factorization.

21001122202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61013.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21001122202 its reverse (20222110012), we get a palindrome (41223232214).

The spelling of 21001122202 in words is "twenty-one billion, one million, one hundred twenty-two thousand, two hundred two".