21222010122211 has 4 divisors (see below), whose sum is σ = 22338958023400. Its totient is φ = 20105062221024.

The previous prime is 21222010122191. The next prime is 21222010122223. The reversal of 21222010122211 is 11222101022212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21222010122211 is a prime.

It is a super-2 number, since 2×21222010122211² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 1116947901169 = 21222010122211 / (2 + 1 + 2 + 2 + 2 + 0 + 1 + 0 + 1 + 2 + 2 + 2 + 1 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21222010122811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 558473950566 + ... + 558473950603.

It is an arithmetic number, because the mean of its divisors is an integer number (5584739505850).

Almost surely, 2^{21222010122211} is an apocalyptic number.

21222010122211 is a deficient number, since it is larger than the sum of its proper divisors (1116947901189).

21222010122211 is a wasteful number, since it uses less digits than its factorization.

21222010122211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1116947901188.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21222010122211 its reverse (11222101022212), we get a palindrome (32444111144423).

Subtracting from 21222010122211 its reverse (11222101022212), we obtain a palindrome (9999909099999).

The spelling of 21222010122211 in words is "twenty-one trillion, two hundred twenty-two billion, ten million, one hundred twenty-two thousand, two hundred eleven".