2021222420 has 24 divisors (see below), whose sum is σ = 4850934144. Its totient is φ = 692990496.

The previous prime is 2021222417. The next prime is 2021222443. The reversal of 2021222420 is 242221202.

It is a super-2 number, since 2×2021222420² = 8170680142221312800, 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 7 ways as a sum of consecutive naturals, for example, 7218512 + ... + 7218791.

It is an arithmetic number, because the mean of its divisors is an integer number (202122256).

Almost surely, 2^2021222420 is an apocalyptic number.

2021222420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021222420 is an abundant number, since it is smaller than the sum of its proper divisors (2829711724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2021222420 is a wasteful number, since it uses less digits than its factorization.

2021222420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14437319 (or 14437317 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 2021222420 is about 44958.0072956976. The cubic root of 2021222420 is about 1264.3618084124.

Adding to 2021222420 its reverse (242221202), we get a palindrome (2263443622).

The spelling of 2021222420 in words is "two billion, twenty-one million, two hundred twenty-two thousand, four hundred twenty".