122222222345 has 4 divisors (see below), whose sum is σ = 146666666820. Its totient is φ = 97777777872.

The previous prime is 122222222299. The next prime is 122222222371. The reversal of 122222222345 is 543222222221.

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

It can be written as a sum of positive squares in 2 ways, for example, as 39372083776 + 82850138569 = 198424^2 + 287837^2 .

It is a cyclic number.

It is not a de Polignac number, because 122222222345 - 2¹⁰ = 122222221321 is a prime.

It is a plaindrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12222222230 + ... + 12222222239.

It is an arithmetic number, because the mean of its divisors is an integer number (36666666705).

Almost surely, 2^122222222345 is an apocalyptic number.

It is an amenable number.

122222222345 is a deficient number, since it is larger than the sum of its proper divisors (24444444475).

122222222345 is an equidigital number, since it uses as much as digits as its factorization.

122222222345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24444444474.

The product of its digits is 15360, while the sum is 29.

Adding to 122222222345 its reverse (543222222221), we get a palindrome (665444444566).

The spelling of 122222222345 in words is "one hundred twenty-two billion, two hundred twenty-two million, two hundred twenty-two thousand, three hundred forty-five".