1200311131 has 4 divisors (see below), whose sum is σ = 1241701200. Its totient is φ = 1158921064.

The previous prime is 1200311107. The next prime is 1200311141. The reversal of 1200311131 is 1311130021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1311130021 = 41 ⋅31978781.

It is a cyclic number.

It is not a de Polignac number, because 1200311131 - 2¹⁹ = 1199786843 is a prime.

It is a super-3 number, since 3×1200311131³ (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 not an unprimeable number, because it can be changed into a prime (1200311141) 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 3 ways as a sum of consecutive naturals, for example, 20694991 + ... + 20695048.

It is an arithmetic number, because the mean of its divisors is an integer number (310425300).

Almost surely, 2^1200311131 is an apocalyptic number.

1200311131 is a deficient number, since it is larger than the sum of its proper divisors (41390069).

1200311131 is an equidigital number, since it uses as much as digits as its factorization.

1200311131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41390068.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 1200311131 is about 34645.5066494921. The cubic root of 1200311131 is about 1062.7504018084.

Adding to 1200311131 its reverse (1311130021), we get a palindrome (2511441152).

The spelling of 1200311131 in words is "one billion, two hundred million, three hundred eleven thousand, one hundred thirty-one".