1020104499991 has 2 divisors, whose sum is σ = 1020104499992. Its totient is φ = 1020104499990.

The previous prime is 1020104499889. The next prime is 1020104500007. The reversal of 1020104499991 is 1999944010201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1020104499991 - 2³¹ = 1017957016343 is a prime.

It is a super-2 number, since 2×1020104499991² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020104496991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510052249995 + 510052249996.

It is an arithmetic number, because the mean of its divisors is an integer number (510052249996).

Almost surely, 2^{1020104499991} is an apocalyptic number.

1020104499991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020104499991 is an equidigital number, since it uses as much as digits as its factorization.

1020104499991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 209952, while the sum is 49.

The spelling of 1020104499991 in words is "one trillion, twenty billion, one hundred four million, four hundred ninety-nine thousand, nine hundred ninety-one".