122206505 has 4 divisors (see below), whose sum is σ = 146647812. Its totient is φ = 97765200.

The previous prime is 122206501. The next prime is 122206507. The reversal of 122206505 is 505602221.

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 14295961 + 107910544 = 3781^2 + 10388^2 .

It is not a de Polignac number, because 122206505 - 2² = 122206501 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122206501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12220646 + ... + 12220655.

It is an arithmetic number, because the mean of its divisors is an integer number (36661953).

Almost surely, 2^122206505 is an apocalyptic number.

It is an amenable number.

122206505 is a deficient number, since it is larger than the sum of its proper divisors (24441307).

122206505 is an equidigital number, since it uses as much as digits as its factorization.

122206505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24441306.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 122206505 is about 11054.7051068764. The cubic root of 122206505 is about 496.2472441142.

Adding to 122206505 its reverse (505602221), we get a palindrome (627808726).

The spelling of 122206505 in words is "one hundred twenty-two million, two hundred six thousand, five hundred five".