2021220012220 has 24 divisors (see below), whose sum is σ = 4295701330704. Its totient is φ = 798747184896.

The previous prime is 2021220012211. The next prime is 2021220012257. The reversal of 2021220012220 is 222100221202.

It is a junction number, because it is equal to n+sod(n) for n = 2021220012194 and 2021220012203.

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, 608799549 + ... + 608802868.

It is an arithmetic number, because the mean of its divisors is an integer number (178987555446).

Almost surely, 2^{2021220012220} is an apocalyptic number.

2021220012220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021220012220 is an abundant number, since it is smaller than the sum of its proper divisors (2274481318484).

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

2021220012220 is a wasteful number, since it uses less digits than its factorization.

2021220012220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1217602509 (or 1217602507 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 2021220012220 its reverse (222100221202), we get a palindrome (2243320233422).

The spelling of 2021220012220 in words is "two trillion, twenty-one billion, two hundred twenty million, twelve thousand, two hundred twenty".