122312112345545 has 4 divisors (see below), whose sum is σ = 146774534814660. Its totient is φ = 97849689876432.

The previous prime is 122312112345529. The next prime is 122312112345547. The reversal of 122312112345545 is 545543211213221.

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 65697638846464 + 56614473499081 = 8105408^2 + 7524259^2 .

It is a cyclic number.

It is not a de Polignac number, because 122312112345545 - 2⁴ = 122312112345529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (122312112345547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12231211234550 + ... + 12231211234559.

It is an arithmetic number, because the mean of its divisors is an integer number (36693633703665).

Almost surely, 2^{122312112345545} is an apocalyptic number.

It is an amenable number.

122312112345545 is a deficient number, since it is larger than the sum of its proper divisors (24462422469115).

122312112345545 is an equidigital number, since it uses as much as digits as its factorization.

122312112345545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24462422469114.

The product of its digits is 288000, while the sum is 41.

Adding to 122312112345545 its reverse (545543211213221), we get a palindrome (667855323558766).

The spelling of 122312112345545 in words is "one hundred twenty-two trillion, three hundred twelve billion, one hundred twelve million, three hundred forty-five thousand, five hundred forty-five".