2020121 has 4 divisors (see below), whose sum is σ = 2031972. Its totient is φ = 2008272.

The previous prime is 2020091. The next prime is 2020147. The reversal of 2020121 is 1210202.

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 1784896 + 235225 = 1336^2 + 485^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2020121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2020099 and 2020108.

It is not an unprimeable number, because it can be changed into a prime (2020171) 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, 5666 + ... + 6011.

It is an arithmetic number, because the mean of its divisors is an integer number (507993).

2^2020121 is an apocalyptic number.

It is an amenable number.

2020121 is a deficient number, since it is larger than the sum of its proper divisors (11851).

2020121 is a wasteful number, since it uses less digits than its factorization.

2020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11850.

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

The square root of 2020121 is about 1421.3096073692. The cubic root of 2020121 is about 126.4132104777.

Adding to 2020121 its reverse (1210202), we get a palindrome (3230323).

The spelling of 2020121 in words is "two million, twenty thousand, one hundred twenty-one".