22112202121 has 4 divisors (see below), whose sum is σ = 22147925200. Its totient is φ = 22076479044.

The previous prime is 22112202103. The next prime is 22112202127. The reversal of 22112202121 is 12120221122.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22112202121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22112202095 and 22112202104.

It is not an unprimeable number, because it can be changed into a prime (22112202127) 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, 17860611 + ... + 17861848.

It is an arithmetic number, because the mean of its divisors is an integer number (5536981300).

Almost surely, 2^22112202121 is an apocalyptic number.

It is an amenable number.

22112202121 is a deficient number, since it is larger than the sum of its proper divisors (35723079).

22112202121 is an equidigital number, since it uses as much as digits as its factorization.

22112202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35723078.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 22112202121 its reverse (12120221122), we get a palindrome (34232423243).

The spelling of 22112202121 in words is "twenty-two billion, one hundred twelve million, two hundred two thousand, one hundred twenty-one".