2222002021 has 4 divisors (see below), whose sum is σ = 2226822444. Its totient is φ = 2217181600.

The previous prime is 2222002019. The next prime is 2222002049. The reversal of 2222002021 is 1202002222.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1702800225 + 519201796 = 41265^2 + 22786^2 .

It is a cyclic number.

It is not a de Polignac number, because 2222002021 - 2¹ = 2222002019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2222001992 and 2222002010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2222002061) 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, 2409520 + ... + 2410441.

It is an arithmetic number, because the mean of its divisors is an integer number (556705611).

Almost surely, 2^2222002021 is an apocalyptic number.

It is an amenable number.

2222002021 is a deficient number, since it is larger than the sum of its proper divisors (4820423).

2222002021 is an equidigital number, since it uses as much as digits as its factorization.

2222002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4820422.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 2222002021 is about 47138.1164345798. The cubic root of 2222002021 is about 1304.9127760339.

Adding to 2222002021 its reverse (1202002222), we get a palindrome (3424004243).

The spelling of 2222002021 in words is "two billion, two hundred twenty-two million, two thousand, twenty-one".