12222325642 has 4 divisors (see below), whose sum is σ = 18333488466. Its totient is φ = 6111162820.

The previous prime is 12222325631. The next prime is 12222325651. The reversal of 12222325642 is 24652322221.

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., 11787227761 + 435097881 = 108569^2 + 20859^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3055581409 + ... + 3055581412.

Almost surely, 2^12222325642 is an apocalyptic number.

12222325642 is a deficient number, since it is larger than the sum of its proper divisors (6111162824).

12222325642 is an equidigital number, since it uses as much as digits as its factorization.

12222325642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6111162823.

The product of its digits is 23040, while the sum is 31.

Adding to 12222325642 its reverse (24652322221), we get a palindrome (36874647863).

The spelling of 12222325642 in words is "twelve billion, two hundred twenty-two million, three hundred twenty-five thousand, six hundred forty-two".