1212222233 has 4 divisors (see below), whose sum is σ = 1251326208. Its totient is φ = 1173118260.

The previous prime is 1212222227. The next prime is 1212222251. The reversal of 1212222233 is 3322222121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1212222233 - 2⁴ = 1212222217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212222203) 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, 19551941 + ... + 19552002.

It is an arithmetic number, because the mean of its divisors is an integer number (312831552).

Almost surely, 2^1212222233 is an apocalyptic number.

It is an amenable number.

1212222233 is a deficient number, since it is larger than the sum of its proper divisors (39103975).

1212222233 is an equidigital number, since it uses as much as digits as its factorization.

1212222233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39103974.

The product of its digits is 576, while the sum is 20.

The square root of 1212222233 is about 34816.9819628296. The cubic root of 1212222233 is about 1066.2541839478.

Adding to 1212222233 its reverse (3322222121), we get a palindrome (4534444354).

The spelling of 1212222233 in words is "one billion, two hundred twelve million, two hundred twenty-two thousand, two hundred thirty-three".