122020547647 has 4 divisors (see below), whose sum is σ = 122828630896. Its totient is φ = 121212464400.

The previous prime is 122020547609. The next prime is 122020547683. The reversal of 122020547647 is 746745020221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122020547647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122020547687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 404041398 + ... + 404041699.

It is an arithmetic number, because the mean of its divisors is an integer number (30707157724).

Almost surely, 2^122020547647 is an apocalyptic number.

122020547647 is a deficient number, since it is larger than the sum of its proper divisors (808083249).

122020547647 is an equidigital number, since it uses as much as digits as its factorization.

122020547647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 808083248.

The product of its (nonzero) digits is 188160, while the sum is 40.

Adding to 122020547647 its reverse (746745020221), we get a palindrome (868765567868).

The spelling of 122020547647 in words is "one hundred twenty-two billion, twenty million, five hundred forty-seven thousand, six hundred forty-seven".