2020021211 has 4 divisors (see below), whose sum is σ = 2175407472. Its totient is φ = 1864634952.

The previous prime is 2020021181. The next prime is 2020021219. The reversal of 2020021211 is 1121200202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1121200202 = 2 ⋅560600101.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2020021211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2020021192 and 2020021201.

It is not an unprimeable number, because it can be changed into a prime (2020021219) 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, 77693111 + ... + 77693136.

It is an arithmetic number, because the mean of its divisors is an integer number (543851868).

Almost surely, 2^2020021211 is an apocalyptic number.

2020021211 is a deficient number, since it is larger than the sum of its proper divisors (155386261).

2020021211 is a wasteful number, since it uses less digits than its factorization.

2020021211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155386260.

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

The square root of 2020021211 is about 44944.6460771469. The cubic root of 2020021211 is about 1264.1112894304. Note that the first 3 decimals are identical.

Adding to 2020021211 its reverse (1121200202), we get a palindrome (3141221413).

The spelling of 2020021211 in words is "two billion, twenty million, twenty-one thousand, two hundred eleven".