1151221333 has 2 divisors, whose sum is σ = 1151221334. Its totient is φ = 1151221332.

The previous prime is 1151221303. The next prime is 1151221339. The reversal of 1151221333 is 3331221511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 671742724 + 479478609 = 25918^2 + 21897^2 .

It is an emirp because it is prime and its reverse (3331221511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1151221333 - 2⁹ = 1151220821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1151221339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 575610666 + 575610667.

It is an arithmetic number, because the mean of its divisors is an integer number (575610667).

Almost surely, 2^1151221333 is an apocalyptic number.

It is an amenable number.

1151221333 is a deficient number, since it is larger than the sum of its proper divisors (1).

1151221333 is an equidigital number, since it uses as much as digits as its factorization.

1151221333 is an evil number, because the sum of its binary digits is even.

The product of its digits is 540, while the sum is 22.

The square root of 1151221333 is about 33929.6527096874. The cubic root of 1151221333 is about 1048.0603140729.

Adding to 1151221333 its reverse (3331221511), we get a palindrome (4482442844).

The spelling of 1151221333 in words is "one billion, one hundred fifty-one million, two hundred twenty-one thousand, three hundred thirty-three".