1215050505121 has 6 divisors (see below), whose sum is σ = 1227199829366. Its totient is φ = 1203020292000.

The previous prime is 1215050505101. The next prime is 1215050505133.

1215050505121 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 3 ways, for example, as 507877149025 + 707173356096 = 712655^2 + 840936^2 .

It is not a de Polignac number, because 1215050505121 - 2¹⁵ = 1215050472353 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1215050505121.

It is not an unprimeable number, because it can be changed into a prime (1215050505101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 59545260 + ... + 59565661.

Almost surely, 2^{1215050505121} is an apocalyptic number.

It is an amenable number.

1215050505121 is a deficient number, since it is larger than the sum of its proper divisors (12149324245).

1215050505121 is an equidigital number, since it uses as much as digits as its factorization.

1215050505121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119111123 (or 119111022 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 28.

The spelling of 1215050505121 in words is "one trillion, two hundred fifteen billion, fifty million, five hundred five thousand, one hundred twenty-one".