221111159 has 2 divisors, whose sum is σ = 221111160. Its totient is φ = 221111158.

The previous prime is 221111141. The next prime is 221111161. The reversal of 221111159 is 951111122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221111159 - 2¹² = 221107063 is a prime.

Together with 221111161, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_12180290 and since 221111159 and 12180290 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221111659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110555579 + 110555580.

It is an arithmetic number, because the mean of its divisors is an integer number (110555580).

Almost surely, 2^221111159 is an apocalyptic number.

221111159 is a deficient number, since it is larger than the sum of its proper divisors (1).

221111159 is an equidigital number, since it uses as much as digits as its factorization.

221111159 is an evil number, because the sum of its binary digits is even.

The product of its digits is 180, while the sum is 23.

The square root of 221111159 is about 14869.8069590698. The cubic root of 221111159 is about 604.6957092841.

The spelling of 221111159 in words is "two hundred twenty-one million, one hundred eleven thousand, one hundred fifty-nine".