122364305561 has 6 divisors (see below), whose sum is σ = 125023197210. Its totient is φ = 119760807536.

The previous prime is 122364305549. The next prime is 122364305611. The reversal of 122364305561 is 165503463221.

It can be written as a sum of positive squares in only one way, i.e., 121128361225 + 1235944336 = 348035^2 + 35156^2 .

It is a de Polignac number, because none of the positive numbers 2^k-122364305561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122364305521) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27694556 + ... + 27698973.

It is an arithmetic number, because the mean of its divisors is an integer number (20837199535).

Almost surely, 2^122364305561 is an apocalyptic number.

It is an amenable number.

122364305561 is a deficient number, since it is larger than the sum of its proper divisors (2658891649).

122364305561 is an frugal number, since it uses more digits than its factorization.

122364305561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55393623 (or 55393576 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 38.

Adding to 122364305561 its reverse (165503463221), we get a palindrome (287867768782).

The spelling of 122364305561 in words is "one hundred twenty-two billion, three hundred sixty-four million, three hundred five thousand, five hundred sixty-one".