101991119 has 2 divisors, whose sum is σ = 101991120. Its totient is φ = 101991118.

The previous prime is 101991091. The next prime is 101991151. The reversal of 101991119 is 911199101.

It is an a-pointer prime, because the next prime (101991151) can be obtained adding 101991119 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 101991119 - 2¹⁶ = 101925583 is a prime.

It is a super-2 number, since 2×101991119² = 20804376709744322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101991319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50995559 + 50995560.

It is an arithmetic number, because the mean of its divisors is an integer number (50995560).

Almost surely, 2^101991119 is an apocalyptic number.

101991119 is a deficient number, since it is larger than the sum of its proper divisors (1).

101991119 is an equidigital number, since it uses as much as digits as its factorization.

101991119 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 729, while the sum is 32.

The square root of 101991119 is about 10099.0652537747. The cubic root of 101991119 is about 467.2193120003.

The spelling of 101991119 in words is "one hundred one million, nine hundred ninety-one thousand, one hundred nineteen".