1302130217561 has 4 divisors (see below), whose sum is σ = 1302133216272. Its totient is φ = 1302127218852.

The previous prime is 1302130217543. The next prime is 1302130217581. The reversal of 1302130217561 is 1657120312031.

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 1302130217561 - 2³⁰ = 1301056475737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1302130217581) 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, 709211 + ... + 1762736.

It is an arithmetic number, because the mean of its divisors is an integer number (325533304068).

Almost surely, 2^{1302130217561} is an apocalyptic number.

It is an amenable number.

1302130217561 is a deficient number, since it is larger than the sum of its proper divisors (2998711).

1302130217561 is an equidigital number, since it uses as much as digits as its factorization.

1302130217561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2998710.

The product of its (nonzero) digits is 7560, while the sum is 32.

Adding to 1302130217561 its reverse (1657120312031), we get a palindrome (2959250529592).

The spelling of 1302130217561 in words is "one trillion, three hundred two billion, one hundred thirty million, two hundred seventeen thousand, five hundred sixty-one".