122705157747 has 4 divisors (see below), whose sum is σ = 163606877000. Its totient is φ = 81803438496.

The previous prime is 122705157719. The next prime is 122705157763. The reversal of 122705157747 is 747751507221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 747751507221 = 3 ⋅249250502407.

It is not a de Polignac number, because 122705157747 - 2³⁴ = 105525288563 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122705157696 and 122705157705.

It is not an unprimeable number, because it can be changed into a prime (122705157797) 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, 20450859622 + ... + 20450859627.

It is an arithmetic number, because the mean of its divisors is an integer number (40901719250).

Almost surely, 2^122705157747 is an apocalyptic number.

122705157747 is a deficient number, since it is larger than the sum of its proper divisors (40901719253).

122705157747 is an equidigital number, since it uses as much as digits as its factorization.

122705157747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40901719252.

The product of its (nonzero) digits is 960400, while the sum is 48.

The spelling of 122705157747 in words is "one hundred twenty-two billion, seven hundred five million, one hundred fifty-seven thousand, seven hundred forty-seven".