22131220211 has 8 divisors (see below), whose sum is σ = 23455803744. Its totient is φ = 20809164160.

The previous prime is 22131220201. The next prime is 22131220213. The reversal of 22131220211 is 11202213122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22131220211 - 2¹⁴ = 22131203827 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22131220211.

It is not an unprimeable number, because it can be changed into a prime (22131220213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 613820 + ... + 648873.

It is an arithmetic number, because the mean of its divisors is an integer number (2931975468).

Almost surely, 2^22131220211 is an apocalyptic number.

22131220211 is a deficient number, since it is larger than the sum of its proper divisors (1324583533).

22131220211 is a wasteful number, since it uses less digits than its factorization.

22131220211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1263741.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 22131220211 its reverse (11202213122), we get a palindrome (33333433333).

The spelling of 22131220211 in words is "twenty-two billion, one hundred thirty-one million, two hundred twenty thousand, two hundred eleven".