1222133321 has 4 divisors (see below), whose sum is σ = 1228465812. Its totient is φ = 1215800832.

The previous prime is 1222133303. The next prime is 1222133323. The reversal of 1222133321 is 1233312221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 108910096 + 1113223225 = 10436^2 + 33365^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222133321 - 2¹⁸ = 1221871177 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1222133293 and 1222133302.

It is not an unprimeable number, because it can be changed into a prime (1222133323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3165956 + ... + 3166341.

It is an arithmetic number, because the mean of its divisors is an integer number (307116453).

Almost surely, 2^1222133321 is an apocalyptic number.

It is an amenable number.

1222133321 is a deficient number, since it is larger than the sum of its proper divisors (6332491).

1222133321 is an equidigital number, since it uses as much as digits as its factorization.

1222133321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6332490.

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

The square root of 1222133321 is about 34959.0234560406. The cubic root of 1222133321 is about 1069.1521863044.

Adding to 1222133321 its reverse (1233312221), we get a palindrome (2455445542).

The spelling of 1222133321 in words is "one billion, two hundred twenty-two million, one hundred thirty-three thousand, three hundred twenty-one".