122249528165 has 4 divisors (see below), whose sum is σ = 146699433804. Its totient is φ = 97799622528.

The previous prime is 122249528161. The next prime is 122249528197. The reversal of 122249528165 is 561825942221.

It is a Cunningham number, because it is equal to 349642²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 561825942221 = 31 ⋅18123417491.

It can be written as a sum of positive squares in 2 ways, for example, as 44010165796 + 78239362369 = 209786^2 + 279713^2 .

It is a cyclic number.

It is not a de Polignac number, because 122249528165 - 2² = 122249528161 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122249528161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12224952812 + ... + 12224952821.

It is an arithmetic number, because the mean of its divisors is an integer number (36674858451).

Almost surely, 2^122249528165 is an apocalyptic number.

It is an amenable number.

122249528165 is a deficient number, since it is larger than the sum of its proper divisors (24449905639).

122249528165 is an equidigital number, since it uses as much as digits as its factorization.

122249528165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24449905638.

The product of its digits is 691200, while the sum is 47.

The spelling of 122249528165 in words is "one hundred twenty-two billion, two hundred forty-nine million, five hundred twenty-eight thousand, one hundred sixty-five".