1215102513445 has 32 divisors (see below), whose sum is σ = 1486418169600. Its totient is φ = 953301021696.

The previous prime is 1215102513413. The next prime is 1215102513479. The reversal of 1215102513445 is 5443152015121.

It is a cyclic number.

It is not a de Polignac number, because 1215102513445 - 2⁵ = 1215102513413 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1215102513445.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 312444061 + ... + 312447949.

It is an arithmetic number, because the mean of its divisors is an integer number (46450567800).

Almost surely, 2^{1215102513445} is an apocalyptic number.

It is an amenable number.

1215102513445 is a deficient number, since it is larger than the sum of its proper divisors (271315656155).

1215102513445 is a wasteful number, since it uses less digits than its factorization.

1215102513445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6237.

The product of its (nonzero) digits is 24000, while the sum is 34.

Adding to 1215102513445 its reverse (5443152015121), we get a palindrome (6658254528566).

The spelling of 1215102513445 in words is "one trillion, two hundred fifteen billion, one hundred two million, five hundred thirteen thousand, four hundred forty-five".