1303220131991 has 2 divisors, whose sum is σ = 1303220131992. Its totient is φ = 1303220131990.

The previous prime is 1303220131949. The next prime is 1303220132009. The reversal of 1303220131991 is 1991310223031.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1303220131991 - 2¹⁰ = 1303220130967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1303220131691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 651610065995 + 651610065996.

It is an arithmetic number, because the mean of its divisors is an integer number (651610065996).

Almost surely, 2^{1303220131991} is an apocalyptic number.

1303220131991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1303220131991 is an equidigital number, since it uses as much as digits as its factorization.

1303220131991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8748, while the sum is 35.

The spelling of 1303220131991 in words is "one trillion, three hundred three billion, two hundred twenty million, one hundred thirty-one thousand, nine hundred ninety-one".