1132221221 has 2 divisors, whose sum is σ = 1132221222. Its totient is φ = 1132221220.

The previous prime is 1132221197. The next prime is 1132221247. The reversal of 1132221221 is 1221222311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 594676996 + 537544225 = 24386^2 + 23185^2 .

It is a cyclic number.

It is not a de Polignac number, because 1132221221 - 2¹⁸ = 1131959077 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1132221221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1132221121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 566110610 + 566110611.

It is an arithmetic number, because the mean of its divisors is an integer number (566110611).

Almost surely, 2^1132221221 is an apocalyptic number.

It is an amenable number.

1132221221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1132221221 is an equidigital number, since it uses as much as digits as its factorization.

1132221221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96, while the sum is 17.

The square root of 1132221221 is about 33648.4950777891. The cubic root of 1132221221 is about 1042.2624626967.

Adding to 1132221221 its reverse (1221222311), we get a palindrome (2353443532).

The spelling of 1132221221 in words is "one billion, one hundred thirty-two million, two hundred twenty-one thousand, two hundred twenty-one".