2001012210 has 48 divisors (see below), whose sum is σ = 5208862464. Its totient is φ = 532964256.

The previous prime is 2001012179. The next prime is 2001012229. The reversal of 2001012210 is 122101002.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2001012192 and 2001012201.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64789 + ... + 90551.

It is an arithmetic number, because the mean of its divisors is an integer number (108517968).

Almost surely, 2^2001012210 is an apocalyptic number.

2001012210 is an abundant number, since it is smaller than the sum of its proper divisors (3207850254).

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

2001012210 is a wasteful number, since it uses less digits than its factorization.

2001012210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26639 (or 26636 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 2001012210 is about 44732.6749703167. The cubic root of 2001012210 is about 1260.1335648283.

Adding to 2001012210 its reverse (122101002), we get a palindrome (2123113212).

The spelling of 2001012210 in words is "two billion, one million, twelve thousand, two hundred ten".