12222312145 has 8 divisors (see below), whose sum is σ = 14669441640. Its totient is φ = 9776071680.

The previous prime is 12222312103. The next prime is 12222312149. The reversal of 12222312145 is 54121322221.

It can be written as a sum of positive squares in 4 ways, for example, as 788544 + 12221523601 = 888^2 + 110551^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12222312145 - 2⁷ = 12222312017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12222312149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191626 + ... + 247315.

It is an arithmetic number, because the mean of its divisors is an integer number (1833680205).

Almost surely, 2^12222312145 is an apocalyptic number.

It is an amenable number.

12222312145 is a deficient number, since it is larger than the sum of its proper divisors (2447129495).

12222312145 is an equidigital number, since it uses as much as digits as its factorization.

12222312145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444515.

The product of its digits is 1920, while the sum is 25.

Adding to 12222312145 its reverse (54121322221), we get a palindrome (66343634366).

The spelling of 12222312145 in words is "twelve billion, two hundred twenty-two million, three hundred twelve thousand, one hundred forty-five".