122121121009 has 4 divisors (see below), whose sum is σ = 122122207216. Its totient is φ = 122120034804.

The previous prime is 122121120997. The next prime is 122121121099. The reversal of 122121121009 is 900121121221.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 122121121009 - 2⁵ = 122121120977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122121121099) 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, 352059 + ... + 606784.

It is an arithmetic number, because the mean of its divisors is an integer number (30530551804).

Almost surely, 2^122121121009 is an apocalyptic number.

It is an amenable number.

122121121009 is a deficient number, since it is larger than the sum of its proper divisors (1086207).

122121121009 is an equidigital number, since it uses as much as digits as its factorization.

122121121009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1086206.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 122121121009 in words is "one hundred twenty-two billion, one hundred twenty-one million, one hundred twenty-one thousand, nine".