22111102121 has 4 divisors (see below), whose sum is σ = 22111882692. Its totient is φ = 22110321552.

The previous prime is 22111102051. The next prime is 22111102127. The reversal of 22111102121 is 12120111122.

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

It can be written as a sum of positive squares in 2 ways, for example, as 15261884521 + 6849217600 = 123539^2 + 82760^2 .

It is a cyclic number.

It is not a de Polignac number, because 22111102121 - 2²² = 22106907817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22111102096 and 22111102105.

It is not an unprimeable number, because it can be changed into a prime (22111102127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 346130 + ... + 405003.

It is an arithmetic number, because the mean of its divisors is an integer number (5527970673).

Almost surely, 2^22111102121 is an apocalyptic number.

It is an amenable number.

22111102121 is a deficient number, since it is larger than the sum of its proper divisors (780571).

22111102121 is an equidigital number, since it uses as much as digits as its factorization.

22111102121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780570.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 22111102121 its reverse (12120111122), we get a palindrome (34231213243).

Subtracting from 22111102121 its reverse (12120111122), we obtain a palindrome (9990990999).

The spelling of 22111102121 in words is "twenty-two billion, one hundred eleven million, one hundred two thousand, one hundred twenty-one".