1131003221 has 2 divisors, whose sum is σ = 1131003222. Its totient is φ = 1131003220.

The previous prime is 1131003197. The next prime is 1131003229. The reversal of 1131003221 is 1223001311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1080436900 + 50566321 = 32870^2 + 7111^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1131003221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1131003196 and 1131003205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1131003229) 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 as a sum of consecutive naturals, namely, 565501610 + 565501611.

It is an arithmetic number, because the mean of its divisors is an integer number (565501611).

Almost surely, 2^1131003221 is an apocalyptic number.

It is an amenable number.

1131003221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131003221 is an equidigital number, since it uses as much as digits as its factorization.

1131003221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1131003221 is about 33630.3913298671. The cubic root of 1131003221 is about 1041.8885866537. Note that the first 3 decimals are identical.

Adding to 1131003221 its reverse (1223001311), we get a palindrome (2354004532).

The spelling of 1131003221 in words is "one billion, one hundred thirty-one million, three thousand, two hundred twenty-one".