2021222122220 has 96 divisors (see below), whose sum is σ = 5056994267136. Its totient is φ = 663995808000.

The previous prime is 2021222122103. The next prime is 2021222122247. The reversal of 2021222122220 is 222212221202.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 2021222122192 and 2021222122201.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1867202 + ... + 2743881.

It is an arithmetic number, because the mean of its divisors is an integer number (52677023616).

Almost surely, 2^{2021222122220} is an apocalyptic number.

2021222122220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021222122220 is an abundant number, since it is smaller than the sum of its proper divisors (3035772144916).

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

2021222122220 is a wasteful number, since it uses less digits than its factorization.

2021222122220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4611231 (or 4611229 counting only the distinct ones).

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

Adding to 2021222122220 its reverse (222212221202), we get a palindrome (2243434343422).

The spelling of 2021222122220 in words is "two trillion, twenty-one billion, two hundred twenty-two million, one hundred twenty-two thousand, two hundred twenty".