1215512501003 has 4 divisors (see below), whose sum is σ = 1215530637168. Its totient is φ = 1215494364840.

The previous prime is 1215512500997. The next prime is 1215512501011. The reversal of 1215512501003 is 3001052155121.

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

It is a cyclic number.

It is not a de Polignac number, because 1215512501003 - 2¹² = 1215512496907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1215512501503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8967176 + ... + 9101717.

It is an arithmetic number, because the mean of its divisors is an integer number (303882659292).

Almost surely, 2^{1215512501003} is an apocalyptic number.

1215512501003 is a deficient number, since it is larger than the sum of its proper divisors (18136165).

1215512501003 is an equidigital number, since it uses as much as digits as its factorization.

1215512501003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18136164.

The product of its (nonzero) digits is 1500, while the sum is 26.

Adding to 1215512501003 its reverse (3001052155121), we get a palindrome (4216564656124).

The spelling of 1215512501003 in words is "one trillion, two hundred fifteen billion, five hundred twelve million, five hundred one thousand, three".