1203133121 has 8 divisors (see below), whose sum is σ = 1245709800. Its totient is φ = 1160629120.

The previous prime is 1203133117. The next prime is 1203133123. The reversal of 1203133121 is 1213313021.

It can be written as a sum of positive squares in 4 ways, for example, as 168610225 + 1034522896 = 12985^2 + 32164^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1203133121 - 2² = 1203133117 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 1203133121.

It is not an unprimeable number, because it can be changed into a prime (1203133123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16685 + ... + 51813.

It is an arithmetic number, because the mean of its divisors is an integer number (155713725).

Almost surely, 2^1203133121 is an apocalyptic number.

It is an amenable number.

1203133121 is a deficient number, since it is larger than the sum of its proper divisors (42576679).

1203133121 is a wasteful number, since it uses less digits than its factorization.

1203133121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36339.

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

The square root of 1203133121 is about 34686.2093777916. The cubic root of 1203133121 is about 1063.5826093012.

Adding to 1203133121 its reverse (1213313021), we get a palindrome (2416446142).

The spelling of 1203133121 in words is "one billion, two hundred three million, one hundred thirty-three thousand, one hundred twenty-one".