1221235333 has 8 divisors (see below), whose sum is σ = 1229966168. Its totient is φ = 1212516864.

The previous prime is 1221235313. The next prime is 1221235343. The reversal of 1221235333 is 3335321221.

It can be written as a sum of positive squares in 4 ways, for example, as 153710404 + 1067524929 = 12398^2 + 32673^2 .

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 1221235333 - 2⁹ = 1221234821 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1221235298 and 1221235307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221235313) 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, 291985 + ... + 296137.

It is an arithmetic number, because the mean of its divisors is an integer number (153745771).

Almost surely, 2^1221235333 is an apocalyptic number.

It is an amenable number.

1221235333 is a deficient number, since it is larger than the sum of its proper divisors (8730835).

1221235333 is a wasteful number, since it uses less digits than its factorization.

1221235333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6183.

The product of its digits is 3240, while the sum is 25.

The square root of 1221235333 is about 34946.1776593664. The cubic root of 1221235333 is about 1068.8902615043.

Adding to 1221235333 its reverse (3335321221), we get a palindrome (4556556554).

The spelling of 1221235333 in words is "one billion, two hundred twenty-one million, two hundred thirty-five thousand, three hundred thirty-three".