1203121231 has 8 divisors (see below), whose sum is σ = 1340347680. Its totient is φ = 1072277472.

The previous prime is 1203121223. The next prime is 1203121279. The reversal of 1203121231 is 1321213021.

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 1203121231 - 2³ = 1203121223 is a prime.

It is a super-3 number, since 3×1203121231³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1203121201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1595275 + ... + 1596028.

It is an arithmetic number, because the mean of its divisors is an integer number (167543460).

Almost surely, 2^1203121231 is an apocalyptic number.

1203121231 is a deficient number, since it is larger than the sum of its proper divisors (137226449).

1203121231 is a wasteful number, since it uses less digits than its factorization.

1203121231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3191345.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1203121231 is about 34686.0379836037. The cubic root of 1203121231 is about 1063.5791056604.

Adding to 1203121231 its reverse (1321213021), we get a palindrome (2524334252).

The spelling of 1203121231 in words is "one billion, two hundred three million, one hundred twenty-one thousand, two hundred thirty-one".