1221222333 has 16 divisors (see below), whose sum is σ = 1697274560. Its totient is φ = 780316416.

The previous prime is 1221222287. The next prime is 1221222341. The reversal of 1221222333 is 3332221221.

It is a happy number.

It is not a de Polignac number, because 1221222333 - 2¹² = 1221218237 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 (1221222733) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74668 + ... + 89541.

It is an arithmetic number, because the mean of its divisors is an integer number (106079660).

Almost surely, 2^1221222333 is an apocalyptic number.

It is an amenable number.

1221222333 is a deficient number, since it is larger than the sum of its proper divisors (476052227).

1221222333 is a wasteful number, since it uses less digits than its factorization.

1221222333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164316.

The product of its digits is 864, while the sum is 21.

The square root of 1221222333 is about 34945.9916585579. The cubic root of 1221222333 is about 1068.8864687266.

Adding to 1221222333 its reverse (3332221221), we get a palindrome (4553443554).

The spelling of 1221222333 in words is "one billion, two hundred twenty-one million, two hundred twenty-two thousand, three hundred thirty-three".