2021212110220 has 48 divisors (see below), whose sum is σ = 4248270623520. Its totient is φ = 807775570944.

The previous prime is 2021212110161. The next prime is 2021212110257. The reversal of 2021212110220 is 220112121202.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2021212110194 and 2021212110203.

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, 196438836 + ... + 196449124.

It is an arithmetic number, because the mean of its divisors is an integer number (88505637990).

Almost surely, 2^{2021212110220} is an apocalyptic number.

2021212110220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021212110220 is an abundant number, since it is smaller than the sum of its proper divisors (2227058513300).

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

2021212110220 is a wasteful number, since it uses less digits than its factorization.

2021212110220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17962 (or 17960 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2021212110220 its reverse (220112121202), we get a palindrome (2241324231422).

The spelling of 2021212110220 in words is "two trillion, twenty-one billion, two hundred twelve million, one hundred ten thousand, two hundred twenty".