191110940281 has 2 divisors, whose sum is σ = 191110940282. Its totient is φ = 191110940280.

The previous prime is 191110940269. The next prime is 191110940287. The reversal of 191110940281 is 182049011191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 183556549225 + 7554391056 = 428435^2 + 86916^2 .

It is a cyclic number.

It is not a de Polignac number, because 191110940281 - 2²¹ = 191108843129 is a prime.

It is a super-2 number, since 2×191110940281² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 191110940281.

It is not a weakly prime, because it can be changed into another prime (191110940287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95555470140 + 95555470141.

It is an arithmetic number, because the mean of its divisors is an integer number (95555470141).

Almost surely, 2^191110940281 is an apocalyptic number.

It is an amenable number.

191110940281 is a deficient number, since it is larger than the sum of its proper divisors (1).

191110940281 is an equidigital number, since it uses as much as digits as its factorization.

191110940281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 37.

The spelling of 191110940281 in words is "one hundred ninety-one billion, one hundred ten million, nine hundred forty thousand, two hundred eighty-one".