2020312121 has 4 divisors (see below), whose sum is σ = 2022393744. Its totient is φ = 2018230500.

The previous prime is 2020312117. The next prime is 2020312127. The reversal of 2020312121 is 1212130202.

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 not a de Polignac number, because 2020312121 - 2² = 2020312117 is a prime.

It is a super-2 number, since 2×2020312121² = 8163322132519037282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2020312096 and 2020312105.

It is not an unprimeable number, because it can be changed into a prime (2020312127) 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, 1039355 + ... + 1041296.

It is an arithmetic number, because the mean of its divisors is an integer number (505598436).

Almost surely, 2^2020312121 is an apocalyptic number.

It is an amenable number.

2020312121 is a deficient number, since it is larger than the sum of its proper divisors (2081623).

2020312121 is an equidigital number, since it uses as much as digits as its factorization.

2020312121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2081622.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 2020312121 is about 44947.8822749192. The cubic root of 2020312121 is about 1264.1719694803.

Adding to 2020312121 its reverse (1212130202), we get a palindrome (3232442323).

The spelling of 2020312121 in words is "two billion, twenty million, three hundred twelve thousand, one hundred twenty-one".