2012012100 has 216 divisors, whose sum is σ = 7330989120. Its totient is φ = 452010240.

The previous prime is 2012012063. The next prime is 2012012153. The reversal of 2012012100 is 12102102.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 368994 + ... + 374406.

Almost surely, 2^2012012100 is an apocalyptic number.

2012012100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2012012100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3665494560).

2012012100 is an abundant number, since it is smaller than the sum of its proper divisors (5318977020).

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

2012012100 is a wasteful number, since it uses less digits than its factorization.

2012012100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5499 (or 5489 counting only the distinct ones).

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

The square root of 2012012100 is about 44855.4578618923. The cubic root of 2012012100 is about 1262.4383997654.

Adding to 2012012100 its reverse (12102102), we get a palindrome (2024114202).

The spelling of 2012012100 in words is "two billion, twelve million, twelve thousand, one hundred".