1213405320331 has 2 divisors, whose sum is σ = 1213405320332. Its totient is φ = 1213405320330.

The previous prime is 1213405320289. The next prime is 1213405320353. The reversal of 1213405320331 is 1330235043121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1213405320331 - 2³⁵ = 1179045581963 is a prime.

It is a super-2 number, since 2×1213405320331² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1213405320331.

It is not a weakly prime, because it can be changed into another prime (1213405320931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606702660165 + 606702660166.

It is an arithmetic number, because the mean of its divisors is an integer number (606702660166).

Almost surely, 2^{1213405320331} is an apocalyptic number.

1213405320331 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213405320331 is an equidigital number, since it uses as much as digits as its factorization.

1213405320331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 28.

The spelling of 1213405320331 in words is "one trillion, two hundred thirteen billion, four hundred five million, three hundred twenty thousand, three hundred thirty-one".