1221123233 has 8 divisors (see below), whose sum is σ = 1357269696. Its totient is φ = 1089166000.

The previous prime is 1221123221. The next prime is 1221123257. The reversal of 1221123233 is 3323211221.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1221123233 is a prime.

It is a super-2 number, since 2×1221123233² = 2982283900344744578, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1221123833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1046693 + ... + 1047858.

It is an arithmetic number, because the mean of its divisors is an integer number (169658712).

Almost surely, 2^1221123233 is an apocalyptic number.

It is an amenable number.

1221123233 is a deficient number, since it is larger than the sum of its proper divisors (136146463).

1221123233 is a wasteful number, since it uses less digits than its factorization.

1221123233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2094615.

The product of its digits is 432, while the sum is 20.

The square root of 1221123233 is about 34944.5737275475. The cubic root of 1221123233 is about 1068.8575552051.

Adding to 1221123233 its reverse (3323211221), we get a palindrome (4544334454).

The spelling of 1221123233 in words is "one billion, two hundred twenty-one million, one hundred twenty-three thousand, two hundred thirty-three".