2001111210 has 128 divisors (see below), whose sum is σ = 6240706560. Its totient is φ = 446741568.

The previous prime is 2001111209. The next prime is 2001111221. The reversal of 2001111210 is 121111002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 2001111192 and 2001111201.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 68959 + ... + 93581.

It is an arithmetic number, because the mean of its divisors is an integer number (48755520).

Almost surely, 2^2001111210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2001111210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3120353280).

2001111210 is an abundant number, since it is smaller than the sum of its proper divisors (4239595350).

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

2001111210 is a wasteful number, since it uses less digits than its factorization.

2001111210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24689 (or 24683 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 2001111210 is about 44733.7815302932. The cubic root of 2001111210 is about 1260.1543461717.

Adding to 2001111210 its reverse (121111002), we get a palindrome (2122222212).

The spelling of 2001111210 in words is "two billion, one million, one hundred eleven thousand, two hundred ten".