1333131211991 has 2 divisors, whose sum is σ = 1333131211992. Its totient is φ = 1333131211990.

The previous prime is 1333131211987. The next prime is 1333131212029. The reversal of 1333131211991 is 1991121313331.

It is a happy number.

It is an a-pointer prime, because the next prime (1333131212029) can be obtained adding 1333131211991 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1333131211991 - 2² = 1333131211987 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1333131211931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 666565605995 + 666565605996.

It is an arithmetic number, because the mean of its divisors is an integer number (666565605996).

Almost surely, 2^{1333131211991} is an apocalyptic number.

1333131211991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1333131211991 is an equidigital number, since it uses as much as digits as its factorization.

1333131211991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13122, while the sum is 38.

The spelling of 1333131211991 in words is "one trillion, three hundred thirty-three billion, one hundred thirty-one million, two hundred eleven thousand, nine hundred ninety-one".