12042221234 has 4 divisors (see below), whose sum is σ = 18063331854. Its totient is φ = 6021110616.

The previous prime is 12042221209. The next prime is 12042221237. The reversal of 12042221234 is 43212224021.

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., 11201047225 + 841174009 = 105835^2 + 29003^2 .

It is not an unprimeable number, because it can be changed into a prime (12042221237) 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, 3010555307 + ... + 3010555310.

Almost surely, 2^12042221234 is an apocalyptic number.

12042221234 is a deficient number, since it is larger than the sum of its proper divisors (6021110620).

12042221234 is an equidigital number, since it uses as much as digits as its factorization.

12042221234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6021110619.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 12042221234 its reverse (43212224021), we get a palindrome (55254445255).

The spelling of 12042221234 in words is "twelve billion, forty-two million, two hundred twenty-one thousand, two hundred thirty-four".