1155421207013 has 2 divisors, whose sum is σ = 1155421207014. Its totient is φ = 1155421207012.

The previous prime is 1155421206883. The next prime is 1155421207037. The reversal of 1155421207013 is 3107021245511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 748323613249 + 407097593764 = 865057^2 + 638042^2 .

It is a cyclic number.

It is not a de Polignac number, because 1155421207013 - 2²⁸ = 1155152771557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1155421207093) 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, 577710603506 + 577710603507.

It is an arithmetic number, because the mean of its divisors is an integer number (577710603507).

Almost surely, 2^{1155421207013} is an apocalyptic number.

It is an amenable number.

1155421207013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155421207013 is an equidigital number, since it uses as much as digits as its factorization.

1155421207013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8400, while the sum is 32.

The spelling of 1155421207013 in words is "one trillion, one hundred fifty-five billion, four hundred twenty-one million, two hundred seven thousand, thirteen".