1200331231 has 4 divisors (see below), whose sum is σ = 1309452264. Its totient is φ = 1091210200.

The previous prime is 1200331207. The next prime is 1200331267. The reversal of 1200331231 is 1321330021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1321330021 = 11 ⋅120120911.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1200331231 is a prime.

It is a super-2 number, since 2×1200331231² = 2881590128227950722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200331271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54560500 + ... + 54560521.

It is an arithmetic number, because the mean of its divisors is an integer number (327363066).

Almost surely, 2^1200331231 is an apocalyptic number.

1200331231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1200331231 is a deficient number, since it is larger than the sum of its proper divisors (109121033).

1200331231 is a wasteful number, since it uses less digits than its factorization.

1200331231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109121032.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 1200331231 is about 34645.7967291849. The cubic root of 1200331231 is about 1062.7563339270.

Adding to 1200331231 its reverse (1321330021), we get a palindrome (2521661252).

It can be divided in two parts, 12003 and 31231, that added together give a palindrome (43234).

The spelling of 1200331231 in words is "one billion, two hundred million, three hundred thirty-one thousand, two hundred thirty-one".