1215414313121 has 4 divisors (see below), whose sum is σ = 1215462590100. Its totient is φ = 1215366036144.

The previous prime is 1215414313073. The next prime is 1215414313123. The reversal of 1215414313121 is 1213134145121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1156431390625 + 58982922496 = 1075375^2 + 242864^2 .

It is a cyclic number.

It is not a de Polignac number, because 1215414313121 - 2²⁶ = 1215347204257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1215414313123) 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 in 3 ways as a sum of consecutive naturals, for example, 24100706 + ... + 24151083.

It is an arithmetic number, because the mean of its divisors is an integer number (303865647525).

Almost surely, 2^{1215414313121} is an apocalyptic number.

It is an amenable number.

1215414313121 is a deficient number, since it is larger than the sum of its proper divisors (48276979).

1215414313121 is an equidigital number, since it uses as much as digits as its factorization.

1215414313121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48276978.

The product of its digits is 2880, while the sum is 29.

Adding to 1215414313121 its reverse (1213134145121), we get a palindrome (2428548458242).

The spelling of 1215414313121 in words is "one trillion, two hundred fifteen billion, four hundred fourteen million, three hundred thirteen thousand, one hundred twenty-one".