2222220221021 has 4 divisors (see below), whose sum is σ = 2225251900092. Its totient is φ = 2219188541952.

The previous prime is 2222220220999. The next prime is 2222220221083. The reversal of 2222220221021 is 1201220222222.

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 2038812736900 + 183407484121 = 1427870^2 + 428261^2 .

It is a cyclic number.

It is not a de Polignac number, because 2222220221021 - 2¹⁴ = 2222220204637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2222220220984 and 2222220221002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2222220221321) 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, 1515838436 + ... + 1515839901.

It is an arithmetic number, because the mean of its divisors is an integer number (556312975023).

Almost surely, 2^{2222220221021} is an apocalyptic number.

It is an amenable number.

2222220221021 is a deficient number, since it is larger than the sum of its proper divisors (3031679071).

2222220221021 is an equidigital number, since it uses as much as digits as its factorization.

2222220221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3031679070.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 2222220221021 its reverse (1201220222222), we get a palindrome (3423440443243).

The spelling of 2222220221021 in words is "two trillion, two hundred twenty-two billion, two hundred twenty million, two hundred twenty-one thousand, twenty-one".