190111121 has 2 divisors, whose sum is σ = 190111122. Its totient is φ = 190111120.

The previous prime is 190111109. The next prime is 190111139. The reversal of 190111121 is 121111091.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 170433025 + 19678096 = 13055^2 + 4436^2 .

It is a cyclic number.

It is not a de Polignac number, because 190111121 - 2⁶ = 190111057 is a prime.

It is a super-2 number, since 2×190111121² = 72284476655753282, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 190111121.

It is not a weakly prime, because it can be changed into another prime (190111021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95055560 + 95055561.

It is an arithmetic number, because the mean of its divisors is an integer number (95055561).

Almost surely, 2^190111121 is an apocalyptic number.

It is an amenable number.

190111121 is a deficient number, since it is larger than the sum of its proper divisors (1).

190111121 is an equidigital number, since it uses as much as digits as its factorization.

190111121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 17.

The square root of 190111121 is about 13788.0789452338. The cubic root of 190111121 is about 575.0017602971.

The spelling of 190111121 in words is "one hundred ninety million, one hundred eleven thousand, one hundred twenty-one".