1215000000241 has 4 divisors (see below), whose sum is σ = 1267826087232. Its totient is φ = 1162173913252.

The previous prime is 1215000000209. The next prime is 1215000000259. The reversal of 1215000000241 is 1420000005121.

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 1215000000241 - 2⁵ = 1215000000209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1215000004241) 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, 26413043461 + ... + 26413043506.

It is an arithmetic number, because the mean of its divisors is an integer number (316956521808).

Almost surely, 2^{1215000000241} is an apocalyptic number.

It is an amenable number.

1215000000241 is a deficient number, since it is larger than the sum of its proper divisors (52826086991).

1215000000241 is an equidigital number, since it uses as much as digits as its factorization.

1215000000241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52826086990.

The product of its (nonzero) digits is 80, while the sum is 16.

Adding to 1215000000241 its reverse (1420000005121), we get a palindrome (2635000005362).

The spelling of 1215000000241 in words is "one trillion, two hundred fifteen billion, two hundred forty-one", and thus it is an aban number.