122120221009 has 4 divisors (see below), whose sum is σ = 122167319716. Its totient is φ = 122073122304.

The previous prime is 122120220997. The next prime is 122120221037. The reversal of 122120221009 is 900122021221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 900122021221 = 181 ⋅4973049841.

It can be written as a sum of positive squares in 2 ways, for example, as 84188763409 + 37931457600 = 290153^2 + 194760^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122120221009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122120221079) 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, 23545464 + ... + 23550649.

It is an arithmetic number, because the mean of its divisors is an integer number (30541829929).

Almost surely, 2^122120221009 is an apocalyptic number.

It is an amenable number.

122120221009 is a deficient number, since it is larger than the sum of its proper divisors (47098707).

122120221009 is an equidigital number, since it uses as much as digits as its factorization.

122120221009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47098706.

The product of its (nonzero) digits is 288, while the sum is 22.

The spelling of 122120221009 in words is "one hundred twenty-two billion, one hundred twenty million, two hundred twenty-one thousand, nine".