1231335445133 has 2 divisors, whose sum is σ = 1231335445134. Its totient is φ = 1231335445132.

The previous prime is 1231335445121. The next prime is 1231335445139. The reversal of 1231335445133 is 3315445331321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1066886541604 + 164448903529 = 1032902^2 + 405523^2 .

It is a cyclic number.

It is not a de Polignac number, because 1231335445133 - 2⁶ = 1231335445069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231335445139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615667722566 + 615667722567.

It is an arithmetic number, because the mean of its divisors is an integer number (615667722567).

Almost surely, 2^{1231335445133} is an apocalyptic number.

It is an amenable number.

1231335445133 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231335445133 is an equidigital number, since it uses as much as digits as its factorization.

1231335445133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 194400, while the sum is 38.

The spelling of 1231335445133 in words is "one trillion, two hundred thirty-one billion, three hundred thirty-five million, four hundred forty-five thousand, one hundred thirty-three".