2001220112 has 20 divisors (see below), whose sum is σ = 3901156560. Its totient is φ = 994470048.

The previous prime is 2001220103. The next prime is 2001220141. The reversal of 2001220112 is 2110221002.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2001220093 and 2001220102.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 381062 + ... + 386277.

It is an arithmetic number, because the mean of its divisors is an integer number (195057828).

Almost surely, 2^2001220112 is an apocalyptic number.

It is an amenable number.

2001220112 is a deficient number, since it is larger than the sum of its proper divisors (1899936448).

2001220112 is a wasteful number, since it uses less digits than its factorization.

2001220112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 767510 (or 767504 counting only the distinct ones).

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

The square root of 2001220112 is about 44734.9987370068. The cubic root of 2001220112 is about 1260.1772052776.

Adding to 2001220112 its reverse (2110221002), we get a palindrome (4111441114).

The spelling of 2001220112 in words is "two billion, one million, two hundred twenty thousand, one hundred twelve".