21202011222 has 64 divisors (see below), whose sum is σ = 48903243264. Its totient is φ = 6002691840.

The previous prime is 21202011199. The next prime is 21202011241. The reversal of 21202011222 is 22211020212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3524197 + ... + 3530207.

It is an arithmetic number, because the mean of its divisors is an integer number (764113176).

Almost surely, 2^21202011222 is an apocalyptic number.

21202011222 is an abundant number, since it is smaller than the sum of its proper divisors (27701232042).

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

21202011222 is a wasteful number, since it uses less digits than its factorization.

21202011222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6773.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21202011222 its reverse (22211020212), we get a palindrome (43413031434).

The spelling of 21202011222 in words is "twenty-one billion, two hundred two million, eleven thousand, two hundred twenty-two".