22121200111 has 2 divisors, whose sum is σ = 22121200112. Its totient is φ = 22121200110.

The previous prime is 22121200103. The next prime is 22121200117. The reversal of 22121200111 is 11100212122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22121200111 - 2³ = 22121200103 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22121200091 and 22121200100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22121200117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11060600055 + 11060600056.

It is an arithmetic number, because the mean of its divisors is an integer number (11060600056).

Almost surely, 2^22121200111 is an apocalyptic number.

22121200111 is a deficient number, since it is larger than the sum of its proper divisors (1).

22121200111 is an equidigital number, since it uses as much as digits as its factorization.

22121200111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 22121200111 its reverse (11100212122), we get a palindrome (33221412233).

The spelling of 22121200111 in words is "twenty-two billion, one hundred twenty-one million, two hundred thousand, one hundred eleven".