111921695219 has 2 divisors, whose sum is σ = 111921695220. Its totient is φ = 111921695218.

The previous prime is 111921695191. The next prime is 111921695231. The reversal of 111921695219 is 912596129111.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111921695219 is a prime.

It is a super-2 number, since 2×111921695219² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (111921695239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55960847609 + 55960847610.

It is an arithmetic number, because the mean of its divisors is an integer number (55960847610).

Almost surely, 2^111921695219 is an apocalyptic number.

111921695219 is a deficient number, since it is larger than the sum of its proper divisors (1).

111921695219 is an equidigital number, since it uses as much as digits as its factorization.

111921695219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 87480, while the sum is 47.

The spelling of 111921695219 in words is "one hundred eleven billion, nine hundred twenty-one million, six hundred ninety-five thousand, two hundred nineteen".