1303013121 has 4 divisors (see below), whose sum is σ = 1737350832. Its totient is φ = 868675412.

The previous prime is 1303013113. The next prime is 1303013147. The reversal of 1303013121 is 1213103031.

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 1303013121 - 2³ = 1303013113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1303013121.

It is not an unprimeable number, because it can be changed into a prime (1303013191) 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, 217168851 + ... + 217168856.

It is an arithmetic number, because the mean of its divisors is an integer number (434337708).

Almost surely, 2^1303013121 is an apocalyptic number.

It is an amenable number.

1303013121 is a deficient number, since it is larger than the sum of its proper divisors (434337711).

1303013121 is an equidigital number, since it uses as much as digits as its factorization.

1303013121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434337710.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 1303013121 is about 36097.2730410484. The cubic root of 1303013121 is about 1092.2354372671.

Adding to 1303013121 its reverse (1213103031), we get a palindrome (2516116152).

The spelling of 1303013121 in words is "one billion, three hundred three million, thirteen thousand, one hundred twenty-one".