2020202021 has 8 divisors (see below), whose sum is σ = 2147917464. Its totient is φ = 1893473280.

The previous prime is 2020202003. The next prime is 2020202071. The reversal of 2020202021 is 1202020202.

It can be written as a sum of positive squares in 4 ways, for example, as 1504276225 + 515925796 = 38785^2 + 22714^2 .

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 2020202021 - 2¹⁸ = 2019939877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2020201993 and 2020202011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2020202071) 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, 242450 + ... + 250643.

It is an arithmetic number, because the mean of its divisors is an integer number (268489683).

Almost surely, 2^2020202021 is an apocalyptic number.

It is an amenable number.

2020202021 is a deficient number, since it is larger than the sum of its proper divisors (127715443).

2020202021 is a wasteful number, since it uses less digits than its factorization.

2020202021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493351.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 2020202021 is about 44946.6575064264. The cubic root of 2020202021 is about 1264.1490047346.

Adding to 2020202021 its reverse (1202020202), we get a palindrome (3222222223).

The spelling of 2020202021 in words is "two billion, twenty million, two hundred two thousand, twenty-one".