1203311121 has 8 divisors (see below), whose sum is σ = 1607568960. Its totient is φ = 800630352.

The previous prime is 1203311113. The next prime is 1203311143. The reversal of 1203311121 is 1211133021.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1203311121 - 2³ = 1203311113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1203311121.

It is not an unprimeable number, because it can be changed into a prime (1203311101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 392485 + ... + 395538.

It is an arithmetic number, because the mean of its divisors is an integer number (200946120).

Almost surely, 2^1203311121 is an apocalyptic number.

It is an amenable number.

1203311121 is a deficient number, since it is larger than the sum of its proper divisors (404257839).

1203311121 is an equidigital number, since it uses as much as digits as its factorization.

1203311121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788535.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1203311121 is about 34688.7751441298. The cubic root of 1203311121 is about 1063.6350580191.

Adding to 1203311121 its reverse (1211133021), we get a palindrome (2414444142).

The spelling of 1203311121 in words is "one billion, two hundred three million, three hundred eleven thousand, one hundred twenty-one".