1223204221234 has 4 divisors (see below), whose sum is σ = 1834806331854. Its totient is φ = 611602110616.

The previous prime is 1223204221231. The next prime is 1223204221247. The reversal of 1223204221234 is 4321224023221.

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

It can be written as a sum of positive squares in only one way, i.e., 823369315609 + 399834905625 = 907397^2 + 632325^2 .

It is not an unprimeable number, because it can be changed into a prime (1223204221231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305801055307 + ... + 305801055310.

Almost surely, 2^{1223204221234} is an apocalyptic number.

1223204221234 is a deficient number, since it is larger than the sum of its proper divisors (611602110620).

1223204221234 is an equidigital number, since it uses as much as digits as its factorization.

1223204221234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611602110619.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 1223204221234 its reverse (4321224023221), we get a palindrome (5544428244455).

The spelling of 1223204221234 in words is "one trillion, two hundred twenty-three billion, two hundred four million, two hundred twenty-one thousand, two hundred thirty-four".