1023109999991 has 2 divisors, whose sum is σ = 1023109999992. Its totient is φ = 1023109999990.

The previous prime is 1023109999987. The next prime is 1023110000057. The reversal of 1023109999991 is 1999999013201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1023109999991 - 2² = 1023109999987 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1023109999921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511554999995 + 511554999996.

It is an arithmetic number, because the mean of its divisors is an integer number (511554999996).

Almost surely, 2^{1023109999991} is an apocalyptic number.

1023109999991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1023109999991 is an equidigital number, since it uses as much as digits as its factorization.

1023109999991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3188646, while the sum is 62.

The spelling of 1023109999991 in words is "one trillion, twenty-three billion, one hundred nine million, nine hundred ninety-nine thousand, nine hundred ninety-one".