122491600145 has 8 divisors (see below), whose sum is σ = 147229711656. Its totient is φ = 97833419136.

The previous prime is 122491600117. The next prime is 122491600157. The reversal of 122491600145 is 541006194221.

It is a Cunningham number, because it is equal to 349988²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 399360256 + 122092239889 = 19984^2 + 349417^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 122491600145 - 2¹⁰ = 122491599121 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19979252 + ... + 19985381.

It is an arithmetic number, because the mean of its divisors is an integer number (18403713957).

Almost surely, 2^122491600145 is an apocalyptic number.

It is an amenable number.

122491600145 is a deficient number, since it is larger than the sum of its proper divisors (24738111511).

122491600145 is an equidigital number, since it uses as much as digits as its factorization.

122491600145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39965251.

The product of its (nonzero) digits is 17280, while the sum is 35.

Adding to 122491600145 its reverse (541006194221), we get a palindrome (663497794366).

The spelling of 122491600145 in words is "one hundred twenty-two billion, four hundred ninety-one million, six hundred thousand, one hundred forty-five".