1215411303205 has 16 divisors (see below), whose sum is σ = 1591107243264. Its totient is φ = 883922518080.

The previous prime is 1215411303203. The next prime is 1215411303229. The reversal of 1215411303205 is 5023031145121.

It is not a de Polignac number, because 1215411303205 - 2¹ = 1215411303203 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215411303203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5239459 + ... + 5466511.

It is an arithmetic number, because the mean of its divisors is an integer number (99444202704).

Almost surely, 2^{1215411303205} is an apocalyptic number.

It is an amenable number.

1215411303205 is a deficient number, since it is larger than the sum of its proper divisors (375695940059).

1215411303205 is a wasteful number, since it uses less digits than its factorization.

1215411303205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324396.

The product of its (nonzero) digits is 3600, while the sum is 28.

Adding to 1215411303205 its reverse (5023031145121), we get a palindrome (6238442448326).

The spelling of 1215411303205 in words is "one trillion, two hundred fifteen billion, four hundred eleven million, three hundred three thousand, two hundred five".