1201303001243 has 4 divisors (see below), whose sum is σ = 1211934001368. Its totient is φ = 1190672001120.

The previous prime is 1201303001189. The next prime is 1201303001309. The reversal of 1201303001243 is 3421003031021.

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

It is a cyclic number.

It is not a de Polignac number, because 1201303001243 - 2⁶ = 1201303001179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201303001443) 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, 5315499893 + ... + 5315500118.

It is an arithmetic number, because the mean of its divisors is an integer number (302983500342).

Almost surely, 2^{1201303001243} is an apocalyptic number.

1201303001243 is a deficient number, since it is larger than the sum of its proper divisors (10631000125).

1201303001243 is a wasteful number, since it uses less digits than its factorization.

1201303001243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10631000124.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 1201303001243 its reverse (3421003031021), we get a palindrome (4622306032264).

The spelling of 1201303001243 in words is "one trillion, two hundred one billion, three hundred three million, one thousand, two hundred forty-three".