1131113221 has 8 divisors (see below), whose sum is σ = 1294704000. Its totient is φ = 968023248.

The previous prime is 1131113201. The next prime is 1131113239. The reversal of 1131113221 is 1223111311.

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 1131113221 - 2⁹ = 1131112709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1131113195 and 1131113204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131113201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120346 + ... + 129403.

It is an arithmetic number, because the mean of its divisors is an integer number (161838000).

Almost surely, 2^1131113221 is an apocalyptic number.

It is an amenable number.

1131113221 is a deficient number, since it is larger than the sum of its proper divisors (163590779).

1131113221 is an equidigital number, since it uses as much as digits as its factorization.

1131113221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250403.

The product of its digits is 36, while the sum is 16.

The square root of 1131113221 is about 33632.0267156174. The cubic root of 1131113221 is about 1041.9223631650.

Adding to 1131113221 its reverse (1223111311), we get a palindrome (2354224532).

The spelling of 1131113221 in words is "one billion, one hundred thirty-one million, one hundred thirteen thousand, two hundred twenty-one".