1215341213501 has 4 divisors (see below), whose sum is σ = 1217966140992. Its totient is φ = 1212716286012.

The previous prime is 1215341213483. The next prime is 1215341213507. The reversal of 1215341213501 is 1053121435121.

It is a happy number.

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 1215341213501 - 2¹⁴ = 1215341197117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215341213507) 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, 1312463051 + ... + 1312463976.

It is an arithmetic number, because the mean of its divisors is an integer number (304491535248).

Almost surely, 2^{1215341213501} is an apocalyptic number.

It is an amenable number.

1215341213501 is a deficient number, since it is larger than the sum of its proper divisors (2624927491).

1215341213501 is an equidigital number, since it uses as much as digits as its factorization.

1215341213501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2624927490.

The product of its (nonzero) digits is 3600, while the sum is 29.

Adding to 1215341213501 its reverse (1053121435121), we get a palindrome (2268462648622).

The spelling of 1215341213501 in words is "one trillion, two hundred fifteen billion, three hundred forty-one million, two hundred thirteen thousand, five hundred one".