1215064605121 has 4 divisors (see below), whose sum is σ = 1215302531632. Its totient is φ = 1214826678612.

The previous prime is 1215064605109. The next prime is 1215064605149.

1215064605121 is nontrivially palindromic in base 10.

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 1215064605121 - 2⁵ = 1215064605089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1215064665121) 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, 118955595 + ... + 118965808.

It is an arithmetic number, because the mean of its divisors is an integer number (303825632908).

Almost surely, 2^{1215064605121} is an apocalyptic number.

It is an amenable number.

1215064605121 is a deficient number, since it is larger than the sum of its proper divisors (237926511).

1215064605121 is an equidigital number, since it uses as much as digits as its factorization.

1215064605121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237926510.

The product of its (nonzero) digits is 14400, while the sum is 34.

The spelling of 1215064605121 in words is "one trillion, two hundred fifteen billion, sixty-four million, six hundred five thousand, one hundred twenty-one".