1215243020303 has 8 divisors (see below), whose sum is σ = 1309023686208. Its totient is φ = 1121505273504.

The previous prime is 1215243020273. The next prime is 1215243020389. The reversal of 1215243020303 is 3030203425121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1215243020303 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 (1215243020393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10670951 + ... + 10784232.

It is an arithmetic number, because the mean of its divisors is an integer number (163627960776).

Almost surely, 2^{1215243020303} is an apocalyptic number.

1215243020303 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1215243020303 is a deficient number, since it is larger than the sum of its proper divisors (93780665905).

1215243020303 is a wasteful number, since it uses less digits than its factorization.

1215243020303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21459553.

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 1215243020303 its reverse (3030203425121), we get a palindrome (4245446445424).

The spelling of 1215243020303 in words is "one trillion, two hundred fifteen billion, two hundred forty-three million, twenty thousand, three hundred three".