2020120121 has 4 divisors (see below), whose sum is σ = 2025059700. Its totient is φ = 2015180544.

The previous prime is 2020120087. The next prime is 2020120127. The reversal of 2020120121 is 1210210202.

It is a happy number.

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 1900524025 + 119596096 = 43595^2 + 10936^2 .

It is a cyclic number.

It is not a de Polignac number, because 2020120121 - 2¹⁸ = 2019857977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2020120127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2469176 + ... + 2469993.

It is an arithmetic number, because the mean of its divisors is an integer number (506264925).

Almost surely, 2^2020120121 is an apocalyptic number.

It is an amenable number.

2020120121 is a deficient number, since it is larger than the sum of its proper divisors (4939579).

2020120121 is an equidigital number, since it uses as much as digits as its factorization.

2020120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4939578.

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

The square root of 2020120121 is about 44945.7464172084. The cubic root of 2020120121 is about 1264.1319214261.

Adding to 2020120121 its reverse (1210210202), we get a palindrome (3230330323).

The spelling of 2020120121 in words is "two billion, twenty million, one hundred twenty thousand, one hundred twenty-one".