1221232330013 has 2 divisors, whose sum is σ = 1221232330014. Its totient is φ = 1221232330012.

The previous prime is 1221232329983. The next prime is 1221232330027. The reversal of 1221232330013 is 3100332321221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1065639160804 + 155593169209 = 1032298^2 + 394453^2 .

It is a cyclic number.

It is not a de Polignac number, because 1221232330013 - 2¹² = 1221232325917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221232330033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610616165006 + 610616165007.

It is an arithmetic number, because the mean of its divisors is an integer number (610616165007).

Almost surely, 2^{1221232330013} is an apocalyptic number.

It is an amenable number.

1221232330013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221232330013 is an equidigital number, since it uses as much as digits as its factorization.

1221232330013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 1221232330013 its reverse (3100332321221), we get a palindrome (4321564651234).

The spelling of 1221232330013 in words is "one trillion, two hundred twenty-one billion, two hundred thirty-two million, three hundred thirty thousand, thirteen".