1131200221 has 8 divisors (see below), whose sum is σ = 1136890944. Its totient is φ = 1125524160.

The previous prime is 1131200219. The next prime is 1131200233. The reversal of 1131200221 is 1220021311.

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 1131200221 - 2¹ = 1131200219 is a prime.

It is a super-2 number, since 2×1131200221² = 2559227879980897682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131200251) 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, 171301 + ... + 177781.

It is an arithmetic number, because the mean of its divisors is an integer number (142111368).

Almost surely, 2^1131200221 is an apocalyptic number.

It is an amenable number.

1131200221 is a deficient number, since it is larger than the sum of its proper divisors (5690723).

1131200221 is an equidigital number, since it uses as much as digits as its factorization.

1131200221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7331.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1131200221 is about 33633.3201007572. The cubic root of 1131200221 is about 1041.9490757640.

Adding to 1131200221 its reverse (1220021311), we get a palindrome (2351221532).

The spelling of 1131200221 in words is "one billion, one hundred thirty-one million, two hundred thousand, two hundred twenty-one".