122020145617 has 4 divisors (see below), whose sum is σ = 124616318976. Its totient is φ = 119423972260.

The previous prime is 122020145609. The next prime is 122020145623. The reversal of 122020145617 is 716541020221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 716541020221 = 13 ⋅55118540017.

It is not a de Polignac number, because 122020145617 - 2³ = 122020145609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122020145627) 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, 1298086609 + ... + 1298086702.

It is an arithmetic number, because the mean of its divisors is an integer number (31154079744).

Almost surely, 2^122020145617 is an apocalyptic number.

It is an amenable number.

122020145617 is a deficient number, since it is larger than the sum of its proper divisors (2596173359).

122020145617 is an equidigital number, since it uses as much as digits as its factorization.

122020145617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2596173358.

The product of its (nonzero) digits is 6720, while the sum is 31.

Adding to 122020145617 its reverse (716541020221), we get a palindrome (838561165838).

The spelling of 122020145617 in words is "one hundred twenty-two billion, twenty million, one hundred forty-five thousand, six hundred seventeen".