1133213221 has 8 divisors (see below), whose sum is σ = 1299679424. Its totient is φ = 967891680.

The previous prime is 1133213117. The next prime is 1133213239. The reversal of 1133213221 is 1223123311.

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

It is not a de Polignac number, because 1133213221 - 2⁹ = 1133212709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1133213621) 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, 284040 + ... + 288001.

It is an arithmetic number, because the mean of its divisors is an integer number (162459928).

Almost surely, 2^1133213221 is an apocalyptic number.

It is an amenable number.

1133213221 is a deficient number, since it is larger than the sum of its proper divisors (166466203).

1133213221 is an equidigital number, since it uses as much as digits as its factorization.

1133213221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572331.

The product of its digits is 216, while the sum is 19.

The square root of 1133213221 is about 33663.2324799625. The cubic root of 1133213221 is about 1042.5667679366.

Adding to 1133213221 its reverse (1223123311), we get a palindrome (2356336532).

The spelling of 1133213221 in words is "one billion, one hundred thirty-three million, two hundred thirteen thousand, two hundred twenty-one".