1215458421313 has 4 divisors (see below), whose sum is σ = 1215663637168. Its totient is φ = 1215253205460.

The previous prime is 1215458421277. The next prime is 1215458421341. The reversal of 1215458421313 is 3131248545121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1215458421313 - 2²⁵ = 1215424866881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1215458421343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102599043 + ... + 102610888.

It is an arithmetic number, because the mean of its divisors is an integer number (303915909292).

Almost surely, 2^{1215458421313} is an apocalyptic number.

It is an amenable number.

1215458421313 is a deficient number, since it is larger than the sum of its proper divisors (205215855).

1215458421313 is an equidigital number, since it uses as much as digits as its factorization.

1215458421313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205215854.

The product of its digits is 115200, while the sum is 40.

The spelling of 1215458421313 in words is "one trillion, two hundred fifteen billion, four hundred fifty-eight million, four hundred twenty-one thousand, three hundred thirteen".