1303121120321 has 16 divisors (see below), whose sum is σ = 1318205306880. Its totient is φ = 1288115861760.

The previous prime is 1303121120309. The next prime is 1303121120377. The reversal of 1303121120321 is 1230211213031.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1303121120321 - 2³⁰ = 1302047378497 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1303121120293 and 1303121120302.

It is not an unprimeable number, because it can be changed into a prime (1303121128321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121679315 + ... + 121690023.

It is an arithmetic number, because the mean of its divisors is an integer number (82387831680).

Almost surely, 2^{1303121120321} is an apocalyptic number.

It is an amenable number.

1303121120321 is a deficient number, since it is larger than the sum of its proper divisors (15084186559).

1303121120321 is a wasteful number, since it uses less digits than its factorization.

1303121120321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14264.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1303121120321 its reverse (1230211213031), we get a palindrome (2533332333352).

The spelling of 1303121120321 in words is "one trillion, three hundred three billion, one hundred twenty-one million, one hundred twenty thousand, three hundred twenty-one".