122636235142 has 4 divisors (see below), whose sum is σ = 183954352716. Its totient is φ = 61318117570.

The previous prime is 122636235133. The next prime is 122636235149. The reversal of 122636235142 is 241532636221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 241532636221 = 16693 ⋅14469097.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122636235149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30659058784 + ... + 30659058787.

It is an arithmetic number, because the mean of its divisors is an integer number (45988588179).

Almost surely, 2^122636235142 is an apocalyptic number.

122636235142 is a deficient number, since it is larger than the sum of its proper divisors (61318117574).

122636235142 is an equidigital number, since it uses as much as digits as its factorization.

122636235142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61318117573.

The product of its digits is 103680, while the sum is 37.

The spelling of 122636235142 in words is "one hundred twenty-two billion, six hundred thirty-six million, two hundred thirty-five thousand, one hundred forty-two".