2112201220 has 24 divisors (see below), whose sum is σ = 4460136408. Its totient is φ = 840211200.

The previous prime is 2112201211. The next prime is 2112201229. The reversal of 2112201220 is 221022112.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2112201211) and next prime (2112201229).

It can be written as a sum of positive squares in 4 ways, for example, as 102292996 + 2009908224 = 10114^2 + 44832^2 .

It is a super-2 number, since 2×2112201220² = 8922787987538976800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2112201220.

It is not an unprimeable number, because it can be changed into a prime (2112201229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 288121 + ... + 295360.

It is an arithmetic number, because the mean of its divisors is an integer number (185839017).

Almost surely, 2^2112201220 is an apocalyptic number.

2112201220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2112201220 is an abundant number, since it is smaller than the sum of its proper divisors (2347935188).

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

2112201220 is a wasteful number, since it uses less digits than its factorization.

2112201220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583671 (or 583669 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 2112201220 is about 45958.6903642826. The cubic root of 2112201220 is about 1283.0544769201.

Adding to 2112201220 its reverse (221022112), we get a palindrome (2333223332).

The spelling of 2112201220 in words is "two billion, one hundred twelve million, two hundred one thousand, two hundred twenty".