2112001220 has 48 divisors (see below), whose sum is σ = 5289193728. Its totient is φ = 692630400.

The previous prime is 2112001219. The next prime is 2112001223. The reversal of 2112001220 is 221002112.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2112001223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 324731 + ... + 331170.

It is an arithmetic number, because the mean of its divisors is an integer number (110191536).

Almost surely, 2^2112001220 is an apocalyptic number.

2112001220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2112001220 is an abundant number, since it is smaller than the sum of its proper divisors (3177192508).

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

2112001220 is a wasteful number, since it uses less digits than its factorization.

2112001220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655940 (or 655938 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 2112001220 is about 45956.5144457236. The cubic root of 2112001220 is about 1283.0139790432.

Adding to 2112001220 its reverse (221002112), we get a palindrome (2333003332).

The spelling of 2112001220 in words is "two billion, one hundred twelve million, one thousand, two hundred twenty".