1042231377991 has 2 divisors, whose sum is σ = 1042231377992. Its totient is φ = 1042231377990.

The previous prime is 1042231377881. The next prime is 1042231378037. The reversal of 1042231377991 is 1997731322401.

It is a strong prime.

It is an emirp because it is prime and its reverse (1997731322401) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1042231377991 - 2³⁷ = 904792424519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1042231377191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 521115688995 + 521115688996.

It is an arithmetic number, because the mean of its divisors is an integer number (521115688996).

Almost surely, 2^{1042231377991} is an apocalyptic number.

1042231377991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1042231377991 is an equidigital number, since it uses as much as digits as its factorization.

1042231377991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 571536, while the sum is 49.

The spelling of 1042231377991 in words is "one trillion, forty-two billion, two hundred thirty-one million, three hundred seventy-seven thousand, nine hundred ninety-one".