1110321901991 has 2 divisors, whose sum is σ = 1110321901992. Its totient is φ = 1110321901990.

The previous prime is 1110321901987. The next prime is 1110321901993. The reversal of 1110321901991 is 1991091230111.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1110321901991 - 2² = 1110321901987 is a prime.

Together with 1110321901993, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1110321901993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555160950995 + 555160950996.

It is an arithmetic number, because the mean of its divisors is an integer number (555160950996).

Almost surely, 2^{1110321901991} is an apocalyptic number.

1110321901991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1110321901991 is an equidigital number, since it uses as much as digits as its factorization.

1110321901991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4374, while the sum is 38.

The spelling of 1110321901991 in words is "one trillion, one hundred ten billion, three hundred twenty-one million, nine hundred one thousand, nine hundred ninety-one".