111110221111951 has 2 divisors, whose sum is σ = 111110221111952. Its totient is φ = 111110221111950.

The previous prime is 111110221111943. The next prime is 111110221112039. The reversal of 111110221111951 is 159111122011111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111110221111951 - 2³ = 111110221111943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111110221111921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55555110555975 + 55555110555976.

It is an arithmetic number, because the mean of its divisors is an integer number (55555110555976).

Almost surely, 2^{111110221111951} is an apocalyptic number.

111110221111951 is a deficient number, since it is larger than the sum of its proper divisors (1).

111110221111951 is an equidigital number, since it uses as much as digits as its factorization.

111110221111951 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 28.

The spelling of 111110221111951 in words is "one hundred eleven trillion, one hundred ten billion, two hundred twenty-one million, one hundred eleven thousand, nine hundred fifty-one".