2001210012 has 72 divisors (see below), whose sum is σ = 5420849616. Its totient is φ = 620250624.

The previous prime is 2001210011. The next prime is 2001210019. The reversal of 2001210012 is 2100121002.

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 = 2001209976 and 2001210003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001210011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31098 + ... + 70494.

It is an arithmetic number, because the mean of its divisors is an integer number (75289578).

Almost surely, 2^2001210012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2001210012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2710424808).

2001210012 is an abundant number, since it is smaller than the sum of its proper divisors (3419639604).

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

2001210012 is a wasteful number, since it uses less digits than its factorization.

2001210012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39507 (or 39502 counting only the distinct ones).

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

The square root of 2001210012 is about 44734.8858498600. The cubic root of 2001210012 is about 1260.1750852690.

Adding to 2001210012 its reverse (2100121002), we get a palindrome (4101331014).

The spelling of 2001210012 in words is "two billion, one million, two hundred ten thousand, twelve".