122170855109 has 4 divisors (see below), whose sum is σ = 122539951680. Its totient is φ = 121801758540.

The previous prime is 122170855091. The next prime is 122170855211. The reversal of 122170855109 is 901558071221.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122170855109 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122170854109) 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, 184547789 + ... + 184548450.

It is an arithmetic number, because the mean of its divisors is an integer number (30634987920).

Almost surely, 2^122170855109 is an apocalyptic number.

It is an amenable number.

122170855109 is a deficient number, since it is larger than the sum of its proper divisors (369096571).

122170855109 is an equidigital number, since it uses as much as digits as its factorization.

122170855109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369096570.

The product of its (nonzero) digits is 50400, while the sum is 41.

The spelling of 122170855109 in words is "one hundred twenty-two billion, one hundred seventy million, eight hundred fifty-five thousand, one hundred nine".