122280117646 has 4 divisors (see below), whose sum is σ = 183420176472. Its totient is φ = 61140058822.

The previous prime is 122280117637. The next prime is 122280117679. The reversal of 122280117646 is 646711082221.

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

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 122280117599 and 122280117608.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 30570029410 + ... + 30570029413.

It is an arithmetic number, because the mean of its divisors is an integer number (45855044118).

Almost surely, 2^122280117646 is an apocalyptic number.

122280117646 is a deficient number, since it is larger than the sum of its proper divisors (61140058826).

122280117646 is an equidigital number, since it uses as much as digits as its factorization.

122280117646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61140058825.

The product of its (nonzero) digits is 64512, while the sum is 40.

Adding to 122280117646 its reverse (646711082221), we get a palindrome (768991199867).

The spelling of 122280117646 in words is "one hundred twenty-two billion, two hundred eighty million, one hundred seventeen thousand, six hundred forty-six".