22121510111 has 2 divisors, whose sum is σ = 22121510112. Its totient is φ = 22121510110.

The previous prime is 22121510071. The next prime is 22121510119. The reversal of 22121510111 is 11101512122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22121510111 - 2¹⁰ = 22121509087 is a prime.

It is a super-2 number, since 2×22121510111² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22121510111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22121510119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11060755055 + 11060755056.

It is an arithmetic number, because the mean of its divisors is an integer number (11060755056).

Almost surely, 2^22121510111 is an apocalyptic number.

22121510111 is a deficient number, since it is larger than the sum of its proper divisors (1).

22121510111 is an equidigital number, since it uses as much as digits as its factorization.

22121510111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40, while the sum is 17.

The spelling of 22121510111 in words is "twenty-two billion, one hundred twenty-one million, five hundred ten thousand, one hundred eleven".