122020121 has 4 divisors (see below), whose sum is σ = 122372112. Its totient is φ = 121668132.

The previous prime is 122020097. The next prime is 122020127. The reversal of 122020121 is 121020221.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-122020121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122020127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 175475 + ... + 176168.

It is an arithmetic number, because the mean of its divisors is an integer number (30593028).

Almost surely, 2^122020121 is an apocalyptic number.

It is an amenable number.

122020121 is a deficient number, since it is larger than the sum of its proper divisors (351991).

122020121 is an equidigital number, since it uses as much as digits as its factorization.

122020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351990.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 122020121 is about 11046.2718145083. The cubic root of 122020121 is about 495.9948309056.

Adding to 122020121 its reverse (121020221), we get a palindrome (243040342).

The spelling of 122020121 in words is "one hundred twenty-two million, twenty thousand, one hundred twenty-one".