121022122121 has 4 divisors (see below), whose sum is σ = 121636447812. Its totient is φ = 120407796432.

The previous prime is 121022122061. The next prime is 121022122189. The reversal of 121022122121 is 121221220121.

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

It can be written as a sum of positive squares in 2 ways, for example, as 108797724025 + 12224398096 = 329845^2 + 110564^2 .

It is a cyclic number.

It is not a de Polignac number, because 121022122121 - 2¹⁰ = 121022121097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 121022122121.

It is not an unprimeable number, because it can be changed into a prime (121022122621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 307162550 + ... + 307162943.

It is an arithmetic number, because the mean of its divisors is an integer number (30409111953).

Almost surely, 2^121022122121 is an apocalyptic number.

It is an amenable number.

121022122121 is a deficient number, since it is larger than the sum of its proper divisors (614325691).

121022122121 is an equidigital number, since it uses as much as digits as its factorization.

121022122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614325690.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 121022122121 its reverse (121221220121), we get a palindrome (242243342242).

The spelling of 121022122121 in words is "one hundred twenty-one billion, twenty-two million, one hundred twenty-two thousand, one hundred twenty-one".