1200431121 has 8 divisors (see below), whose sum is σ = 1600788000. Its totient is φ = 800180832.

The previous prime is 1200431119. The next prime is 1200431131. The reversal of 1200431121 is 1211340021.

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

It is not a de Polignac number, because 1200431121 - 2¹ = 1200431119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1200431121.

It is not an unprimeable number, because it can be changed into a prime (1200431131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5005 + ... + 49253.

It is an arithmetic number, because the mean of its divisors is an integer number (200098500).

Almost surely, 2^1200431121 is an apocalyptic number.

It is an amenable number.

1200431121 is a deficient number, since it is larger than the sum of its proper divisors (400356879).

1200431121 is an equidigital number, since it uses as much as digits as its factorization.

1200431121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53295.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1200431121 is about 34647.2382882099. The cubic root of 1200431121 is about 1062.7858135081.

Adding to 1200431121 its reverse (1211340021), we get a palindrome (2411771142).

The spelling of 1200431121 in words is "one billion, two hundred million, four hundred thirty-one thousand, one hundred twenty-one".