101250111491 has 2 divisors, whose sum is σ = 101250111492. Its totient is φ = 101250111490.

The previous prime is 101250111421. The next prime is 101250111493. The reversal of 101250111491 is 194111052101.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101250111491 is a prime.

Together with 101250111493, it forms a pair of twin primes.

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 101250111491.

It is not a weakly prime, because it can be changed into another prime (101250111493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50625055745 + 50625055746.

It is an arithmetic number, because the mean of its divisors is an integer number (50625055746).

Almost surely, 2^101250111491 is an apocalyptic number.

101250111491 is a deficient number, since it is larger than the sum of its proper divisors (1).

101250111491 is an equidigital number, since it uses as much as digits as its factorization.

101250111491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 26.

Adding to 101250111491 its reverse (194111052101), we get a palindrome (295361163592).

The spelling of 101250111491 in words is "one hundred one billion, two hundred fifty million, one hundred eleven thousand, four hundred ninety-one".