122122123505 has 4 divisors (see below), whose sum is σ = 146546548212. Its totient is φ = 97697698800.

The previous prime is 122122123493. The next prime is 122122123537. The reversal of 122122123505 is 505321221221.

It is a happy number.

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 41652319921 + 80469803584 = 204089^2 + 283672^2 .

It is not a de Polignac number, because 122122123505 - 2¹² = 122122119409 is a prime.

It is a Duffinian number.

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, 12212212346 + ... + 12212212355.

It is an arithmetic number, because the mean of its divisors is an integer number (36636637053).

Almost surely, 2^122122123505 is an apocalyptic number.

It is an amenable number.

122122123505 is a deficient number, since it is larger than the sum of its proper divisors (24424424707).

122122123505 is an equidigital number, since it uses as much as digits as its factorization.

122122123505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24424424706.

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 122122123505 its reverse (505321221221), we get a palindrome (627443344726).

The spelling of 122122123505 in words is "one hundred twenty-two billion, one hundred twenty-two million, one hundred twenty-three thousand, five hundred five".