2021220011 has 4 divisors (see below), whose sum is σ = 2021950632. Its totient is φ = 2020489392.

The previous prime is 2021219983. The next prime is 2021220017. The reversal of 2021220011 is 1100221202.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2021220011 - 2¹⁰ = 2021218987 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2021219974 and 2021220001.

It is not an unprimeable number, because it can be changed into a prime (2021220017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 361145 + ... + 366698.

It is an arithmetic number, because the mean of its divisors is an integer number (505487658).

Almost surely, 2^2021220011 is an apocalyptic number.

2021220011 is a deficient number, since it is larger than the sum of its proper divisors (730621).

2021220011 is an equidigital number, since it uses as much as digits as its factorization.

2021220011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 730620.

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

The square root of 2021220011 is about 44957.9805040218. The cubic root of 2021220011 is about 1264.3613061010.

Adding to 2021220011 its reverse (1100221202), we get a palindrome (3121441213).

The spelling of 2021220011 in words is "two billion, twenty-one million, two hundred twenty thousand, eleven".