1131200111 has 8 divisors (see below), whose sum is σ = 1212173424. Its totient is φ = 1051830400.

The previous prime is 1131200087. The next prime is 1131200123. The reversal of 1131200111 is 1110021311.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1131200111 - 2⁶ = 1131200047 is a prime.

It is a super-2 number, since 2×1131200111² = 2559227382252824642, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1131200092 and 1131200101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131200141) 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 7 ways as a sum of consecutive naturals, for example, 399440 + ... + 402261.

It is an arithmetic number, because the mean of its divisors is an integer number (151521678).

Almost surely, 2^1131200111 is an apocalyptic number.

1131200111 is a deficient number, since it is larger than the sum of its proper divisors (80973313).

1131200111 is an equidigital number, since it uses as much as digits as its factorization.

1131200111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801801.

The product of its (nonzero) digits is 6, while the sum is 11.

The square root of 1131200111 is about 33633.3184654741. The cubic root of 1131200111 is about 1041.9490419903.

Adding to 1131200111 its reverse (1110021311), we get a palindrome (2241221422).

It can be divided in two parts, 1131200 and 111, that added together give a palindrome (1131311).

The spelling of 1131200111 in words is "one billion, one hundred thirty-one million, two hundred thousand, one hundred eleven".