1013200231991 has 2 divisors, whose sum is σ = 1013200231992. Its totient is φ = 1013200231990.

The previous prime is 1013200231973. The next prime is 1013200232017. The reversal of 1013200231991 is 1991320023101.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1013200231991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1013200231091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506600115995 + 506600115996.

It is an arithmetic number, because the mean of its divisors is an integer number (506600115996).

Almost surely, 2^{1013200231991} is an apocalyptic number.

1013200231991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1013200231991 is an equidigital number, since it uses as much as digits as its factorization.

1013200231991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 32.

The spelling of 1013200231991 in words is "one trillion, thirteen billion, two hundred million, two hundred thirty-one thousand, nine hundred ninety-one".