1131103221 has 8 divisors (see below), whose sum is σ = 1509560640. Its totient is φ = 753357312.

The previous prime is 1131103217. The next prime is 1131103241. The reversal of 1131103221 is 1223011311.

It is a happy number.

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

It is not a de Polignac number, because 1131103221 - 2² = 1131103217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1131103221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131103241) 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, 174156 + ... + 180533.

It is an arithmetic number, because the mean of its divisors is an integer number (188695080).

Almost surely, 2^1131103221 is an apocalyptic number.

It is an amenable number.

1131103221 is a deficient number, since it is larger than the sum of its proper divisors (378457419).

1131103221 is a wasteful number, since it uses less digits than its factorization.

1131103221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355755.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1131103221 is about 33631.8780474716. The cubic root of 1131103221 is about 1041.9192926636.

Adding to 1131103221 its reverse (1223011311), we get a palindrome (2354114532).

The spelling of 1131103221 in words is "one billion, one hundred thirty-one million, one hundred three thousand, two hundred twenty-one".