121626121 has 4 divisors (see below), whose sum is σ = 122431744. Its totient is φ = 120820500.

The previous prime is 121626077. The next prime is 121626137.

121626121 is nontrivially palindromic in base 10.

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 not a de Polignac number, because 121626121 - 2¹⁹ = 121101833 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121626092 and 121626101.

It is not an unprimeable number, because it can be changed into a prime (121626181) 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, 402585 + ... + 402886.

It is an arithmetic number, because the mean of its divisors is an integer number (30607936).

Almost surely, 2^121626121 is an apocalyptic number.

It is an amenable number.

121626121 is a deficient number, since it is larger than the sum of its proper divisors (805623).

121626121 is an equidigital number, since it uses as much as digits as its factorization.

121626121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805622.

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

The square root of 121626121 is about 11028.4233233949. The cubic root of 121626121 is about 495.4604035301.

The spelling of 121626121 in words is "one hundred twenty-one million, six hundred twenty-six thousand, one hundred twenty-one".