1221133333 has 8 divisors (see below), whose sum is σ = 1403292800. Its totient is φ = 1040901840.

The previous prime is 1221133313. The next prime is 1221133351. The reversal of 1221133333 is 3333311221.

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

It is a cyclic number.

It is not a de Polignac number, because 1221133333 - 2¹⁷ = 1221002261 is a prime.

1221133333 is a modest number, since divided by 33333 gives 12211 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221133313) 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, 480633 + ... + 483166.

It is an arithmetic number, because the mean of its divisors is an integer number (175411600).

Almost surely, 2^1221133333 is an apocalyptic number.

It is an amenable number.

1221133333 is a deficient number, since it is larger than the sum of its proper divisors (182159467).

1221133333 is an equidigital number, since it uses as much as digits as its factorization.

1221133333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 963987.

The product of its digits is 972, while the sum is 22.

The square root of 1221133333 is about 34944.7182418173. The cubic root of 1221133333 is about 1068.8605020634.

Adding to 1221133333 its reverse (3333311221), we get a palindrome (4554444554).

The spelling of 1221133333 in words is "one billion, two hundred twenty-one million, one hundred thirty-three thousand, three hundred thirty-three".