191123247101 has 2 divisors, whose sum is σ = 191123247102. Its totient is φ = 191123247100.

The previous prime is 191123247067. The next prime is 191123247109. The reversal of 191123247101 is 101742321191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 173700567076 + 17422680025 = 416774^2 + 131995^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-191123247101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191123247109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95561623550 + 95561623551.

It is an arithmetic number, because the mean of its divisors is an integer number (95561623551).

Almost surely, 2^191123247101 is an apocalyptic number.

It is an amenable number.

191123247101 is a deficient number, since it is larger than the sum of its proper divisors (1).

191123247101 is an equidigital number, since it uses as much as digits as its factorization.

191123247101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 32.

Adding to 191123247101 its reverse (101742321191), we get a palindrome (292865568292).

The spelling of 191123247101 in words is "one hundred ninety-one billion, one hundred twenty-three million, two hundred forty-seven thousand, one hundred one".