1200231312331 has 4 divisors (see below), whose sum is σ = 1200241418392. Its totient is φ = 1200221206272.

The previous prime is 1200231312253. The next prime is 1200231312337. The reversal of 1200231312331 is 1332131320021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1200231312331 is a prime.

It is a super-2 number, since 2×1200231312331² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1200231312337) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4872741 + ... + 5113126.

It is an arithmetic number, because the mean of its divisors is an integer number (300060354598).

Almost surely, 2^{1200231312331} is an apocalyptic number.

1200231312331 is a deficient number, since it is larger than the sum of its proper divisors (10106061).

1200231312331 is an equidigital number, since it uses as much as digits as its factorization.

1200231312331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10106060.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 1200231312331 its reverse (1332131320021), we get a palindrome (2532362632352).

The spelling of 1200231312331 in words is "one trillion, two hundred billion, two hundred thirty-one million, three hundred twelve thousand, three hundred thirty-one".