2021213201 has 24 divisors (see below), whose sum is σ = 2384588160. Its totient is φ = 1708036512.

The previous prime is 2021213189. The next prime is 2021213213. The reversal of 2021213201 is 1023121202.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2021213189) and next prime (2021213213).

It is not a de Polignac number, because 2021213201 - 2⁶ = 2021213137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021213281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1252271 + ... + 1253883.

It is an arithmetic number, because the mean of its divisors is an integer number (99357840).

Almost surely, 2^2021213201 is an apocalyptic number.

It is an amenable number.

2021213201 is a deficient number, since it is larger than the sum of its proper divisors (363374959).

2021213201 is a wasteful number, since it uses less digits than its factorization.

2021213201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1973 (or 1966 counting only the distinct ones).

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

The square root of 2021213201 is about 44957.9047665702. The cubic root of 2021213201 is about 1264.3598861154.

Adding to 2021213201 its reverse (1023121202), we get a palindrome (3044334403).

The spelling of 2021213201 in words is "two billion, twenty-one million, two hundred thirteen thousand, two hundred one".