1131200120 has 32 divisors (see below), whose sum is σ = 2546158320. Its totient is φ = 452309760.

The previous prime is 1131200087. The next prime is 1131200123. The reversal of 1131200120 is 210021311.

It is a super-2 number, since 2×1131200120² = 2559227422976028800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131200123) 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 7 ways as a sum of consecutive naturals, for example, 201755 + ... + 207285.

Almost surely, 2^1131200120 is an apocalyptic number.

1131200120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1131200120 is an abundant number, since it is smaller than the sum of its proper divisors (1414958200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1131200120 is a wasteful number, since it uses less digits than its factorization.

1131200120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10655 (or 10651 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 1131200120 is about 33633.3185992700. The cubic root of 1131200120 is about 1041.9490447536.

Adding to 1131200120 its reverse (210021311), we get a palindrome (1341221431).

The spelling of 1131200120 in words is "one billion, one hundred thirty-one million, two hundred thousand, one hundred twenty".