2021220205 has 16 divisors (see below), whose sum is σ = 2443633920. Its totient is φ = 1604893312.

The previous prime is 2021220193. The next prime is 2021220211. The reversal of 2021220205 is 5020221202.

It is a cyclic number.

It is not a de Polignac number, because 2021220205 - 2⁷ = 2021220077 is a prime.

It is a super-2 number, since 2×2021220205² = 8170662234200484050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 739281 + ... + 742009.

It is an arithmetic number, because the mean of its divisors is an integer number (152727120).

Almost surely, 2^2021220205 is an apocalyptic number.

It is an amenable number.

2021220205 is a deficient number, since it is larger than the sum of its proper divisors (422413715).

2021220205 is a wasteful number, since it uses less digits than its factorization.

2021220205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3788.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 2021220205 is about 44957.9826615919. The cubic root of 2021220205 is about 1264.3613465529.

Adding to 2021220205 its reverse (5020221202), we get a palindrome (7041441407).

The spelling of 2021220205 in words is "two billion, twenty-one million, two hundred twenty thousand, two hundred five".