122336561 has 4 divisors (see below), whose sum is σ = 124644852. Its totient is φ = 120028272.

The previous prime is 122336549. The next prime is 122336581. The reversal of 122336561 is 165633221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 165633221 = 13 ⋅12741017.

It can be written as a sum of positive squares in 2 ways, for example, as 36663025 + 85673536 = 6055^2 + 9256^2 .

It is a cyclic number.

It is not a de Polignac number, because 122336561 - 2¹⁸ = 122074417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (122336521) 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, 1154066 + ... + 1154171.

It is an arithmetic number, because the mean of its divisors is an integer number (31161213).

Almost surely, 2^122336561 is an apocalyptic number.

It is an amenable number.

122336561 is a deficient number, since it is larger than the sum of its proper divisors (2308291).

122336561 is an equidigital number, since it uses as much as digits as its factorization.

122336561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2308290.

The product of its digits is 6480, while the sum is 29.

The square root of 122336561 is about 11060.5859248052. The cubic root of 122336561 is about 496.4232223350.

Adding to 122336561 its reverse (165633221), we get a palindrome (287969782).

The spelling of 122336561 in words is "one hundred twenty-two million, three hundred thirty-six thousand, five hundred sixty-one".