1223121333 has 32 divisors (see below), whose sum is σ = 1998950400. Its totient is φ = 649636416.

The previous prime is 1223121323. The next prime is 1223121353. The reversal of 1223121333 is 3331213221.

It is not a de Polignac number, because 1223121333 - 2¹⁷ = 1222990261 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223121323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7773 + ... + 50066.

It is an arithmetic number, because the mean of its divisors is an integer number (62467200).

Almost surely, 2^1223121333 is an apocalyptic number.

It is an amenable number.

1223121333 is a deficient number, since it is larger than the sum of its proper divisors (775829067).

1223121333 is a wasteful number, since it uses less digits than its factorization.

1223121333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57921.

The product of its digits is 648, while the sum is 21.

The square root of 1223121333 is about 34973.1516023363. The cubic root of 1223121333 is about 1069.4402210714.

Adding to 1223121333 its reverse (3331213221), we get a palindrome (4554334554).

The spelling of 1223121333 in words is "one billion, two hundred twenty-three million, one hundred twenty-one thousand, three hundred thirty-three".