121020121 has 4 divisors (see below), whose sum is σ = 121212544. Its totient is φ = 120827700.

The previous prime is 121020113. The next prime is 121020131.

121020121 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 121020121 - 2³ = 121020113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121020098 and 121020107.

It is not an unprimeable number, because it can be changed into a prime (121020131) 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, 95265 + ... + 96526.

It is an arithmetic number, because the mean of its divisors is an integer number (30303136).

Almost surely, 2^121020121 is an apocalyptic number.

It is an amenable number.

121020121 is a deficient number, since it is larger than the sum of its proper divisors (192423).

121020121 is an equidigital number, since it uses as much as digits as its factorization.

121020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192422.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 121020121 is about 11000.9145528906. The cubic root of 121020121 is about 494.6361588454.

The spelling of 121020121 in words is "one hundred twenty-one million, twenty thousand, one hundred twenty-one".