22111000121 has 4 divisors (see below), whose sum is σ = 25269714432. Its totient is φ = 18952285812.

The previous prime is 22111000097. The next prime is 22111000129. The reversal of 22111000121 is 12100011122.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12100011122 = 2 ⋅6050005561.

It is a cyclic number.

It is not a de Polignac number, because 22111000121 - 2³⁴ = 4931130937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22111000129) 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, 1579357145 + ... + 1579357158.

It is an arithmetic number, because the mean of its divisors is an integer number (6317428608).

Almost surely, 2^22111000121 is an apocalyptic number.

It is an amenable number.

22111000121 is a deficient number, since it is larger than the sum of its proper divisors (3158714311).

22111000121 is an equidigital number, since it uses as much as digits as its factorization.

22111000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3158714310.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 22111000121 its reverse (12100011122), we get a palindrome (34211011243).

The spelling of 22111000121 in words is "twenty-two billion, one hundred eleven million, one hundred twenty-one", and thus it is an aban number.