2020221222221 has 4 divisors (see below), whose sum is σ = 2020224265500. Its totient is φ = 2020218178944.

The previous prime is 2020221222197. The next prime is 2020221222223. The reversal of 2020221222221 is 1222221220202.

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 1720848099721 + 299373122500 = 1311811^2 + 547150^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2020221222221 is a prime.

It is a super-2 number, since 2×2020221222221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2020221222193 and 2020221222202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2020221222223) 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, 54116 + ... + 2010813.

It is an arithmetic number, because the mean of its divisors is an integer number (505056066375).

Almost surely, 2^{2020221222221} is an apocalyptic number.

It is an amenable number.

2020221222221 is a deficient number, since it is larger than the sum of its proper divisors (3043279).

2020221222221 is an equidigital number, since it uses as much as digits as its factorization.

2020221222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3043278.

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

Adding to 2020221222221 its reverse (1222221220202), we get a palindrome (3242442442423).

The spelling of 2020221222221 in words is "two trillion, twenty billion, two hundred twenty-one million, two hundred twenty-two thousand, two hundred twenty-one".