1303031020121 has 4 divisors (see below), whose sum is σ = 1303139176500. Its totient is φ = 1302922863744.

The previous prime is 1303031019991. The next prime is 1303031020141. The reversal of 1303031020121 is 1210201303031.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 910810644496 + 392220375625 = 954364^2 + 626275^2 .

It is a cyclic number.

It is not a de Polignac number, because 1303031020121 - 2¹⁰ = 1303031019097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1303031020121.

It is not an unprimeable number, because it can be changed into a prime (1303031020141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54060116 + ... + 54084213.

It is an arithmetic number, because the mean of its divisors is an integer number (325784794125).

Almost surely, 2^{1303031020121} is an apocalyptic number.

It is an amenable number.

1303031020121 is a deficient number, since it is larger than the sum of its proper divisors (108156379).

1303031020121 is a wasteful number, since it uses less digits than its factorization.

1303031020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108156378.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 1303031020121 its reverse (1210201303031), we get a palindrome (2513232323152).

The spelling of 1303031020121 in words is "one trillion, three hundred three billion, thirty-one million, twenty thousand, one hundred twenty-one".