2020002121 has 8 divisors (see below), whose sum is σ = 2048781384. Its totient is φ = 1991395200.

The previous prime is 2020002073. The next prime is 2020002139. The reversal of 2020002121 is 1212000202.

It can be written as a sum of positive squares in 4 ways, for example, as 1045875600 + 974126521 = 32340^2 + 31211^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2020002121 - 2¹⁵ = 2019969353 is a prime.

It is a Duffinian number.

2020002121 is a modest number, since divided by 2121 gives 2020 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 2020002098 and 2020002107.

It is not an unprimeable number, because it can be changed into a prime (2020002151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19386 + ... + 66451.

It is an arithmetic number, because the mean of its divisors is an integer number (256097673).

Almost surely, 2^2020002121 is an apocalyptic number.

It is an amenable number.

2020002121 is a deficient number, since it is larger than the sum of its proper divisors (28779263).

2020002121 is a wasteful number, since it uses less digits than its factorization.

2020002121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86171.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 2020002121 is about 44944.4337042976. The cubic root of 2020002121 is about 1264.1073073005.

Adding to 2020002121 its reverse (1212000202), we get a palindrome (3232002323).

The spelling of 2020002121 in words is "two billion, twenty million, two thousand, one hundred twenty-one".