22121101111 has 2 divisors, whose sum is σ = 22121101112. Its totient is φ = 22121101110.

The previous prime is 22121101039. The next prime is 22121101147. The reversal of 22121101111 is 11110112122.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22121101111 - 2²⁷ = 21986883383 is a prime.

It is a super-2 number, since 2×22121101111² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22121101091 and 22121101100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22121101411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11060550555 + 11060550556.

It is an arithmetic number, because the mean of its divisors is an integer number (11060550556).

Almost surely, 2^22121101111 is an apocalyptic number.

22121101111 is a deficient number, since it is larger than the sum of its proper divisors (1).

22121101111 is an equidigital number, since it uses as much as digits as its factorization.

22121101111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 22121101111 its reverse (11110112122), we get a palindrome (33231213233).

The spelling of 22121101111 in words is "twenty-two billion, one hundred twenty-one million, one hundred one thousand, one hundred eleven".