122121218859 has 4 divisors (see below), whose sum is σ = 162828291816. Its totient is φ = 81414145904.

The previous prime is 122121218851. The next prime is 122121218881. The reversal of 122121218859 is 958812121221.

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

It is a cyclic number.

It is not a de Polignac number, because 122121218859 - 2³ = 122121218851 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 122121218859.

It is not an unprimeable number, because it can be changed into a prime (122121218851) 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, 20353536474 + ... + 20353536479.

It is an arithmetic number, because the mean of its divisors is an integer number (40707072954).

Almost surely, 2^122121218859 is an apocalyptic number.

122121218859 is a deficient number, since it is larger than the sum of its proper divisors (40707072957).

122121218859 is an equidigital number, since it uses as much as digits as its factorization.

122121218859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40707072956.

The product of its digits is 46080, while the sum is 42.

The spelling of 122121218859 in words is "one hundred twenty-two billion, one hundred twenty-one million, two hundred eighteen thousand, eight hundred fifty-nine".