1200111312231 has 12 divisors (see below), whose sum is σ = 1866839819208. Its totient is φ = 738530038224.

The previous prime is 1200111312209. The next prime is 1200111312289. The reversal of 1200111312231 is 1322131110021.

1200111312231 is a `hidden beast` number, since 12 + 0 + 0 + 111 + 312 + 231 = 666.

It is not a de Polignac number, because 1200111312231 - 2⁶ = 1200111312167 is a prime.

It is a super-2 number, since 2×1200111312231² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200111312331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5128680705 + ... + 5128680938.

It is an arithmetic number, because the mean of its divisors is an integer number (155569984934).

Almost surely, 2^{1200111312231} is an apocalyptic number.

1200111312231 is a deficient number, since it is larger than the sum of its proper divisors (666728506977).

1200111312231 is a wasteful number, since it uses less digits than its factorization.

1200111312231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10257361662 (or 10257361659 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1200111312231 its reverse (1322131110021), we get a palindrome (2522242422252).

The spelling of 1200111312231 in words is "one trillion, two hundred billion, one hundred eleven million, three hundred twelve thousand, two hundred thirty-one".