1001112101491 has 2 divisors, whose sum is σ = 1001112101492. Its totient is φ = 1001112101490.

The previous prime is 1001112101447. The next prime is 1001112101501. The reversal of 1001112101491 is 1941012111001.

It is a strong prime.

It is an emirp because it is prime and its reverse (1941012111001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1001112101491 - 2¹³ = 1001112093299 is a prime.

It is not a weakly prime, because it can be changed into another prime (1001112101441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500556050745 + 500556050746.

It is an arithmetic number, because the mean of its divisors is an integer number (500556050746).

Almost surely, 2^{1001112101491} is an apocalyptic number.

1001112101491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001112101491 is an equidigital number, since it uses as much as digits as its factorization.

1001112101491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 22.

Adding to 1001112101491 its reverse (1941012111001), we get a palindrome (2942124212492).

The spelling of 1001112101491 in words is "one trillion, one billion, one hundred twelve million, one hundred one thousand, four hundred ninety-one".