2100000012 has 36 divisors (see below), whose sum is σ = 5385954168. Its totient is φ = 636363200.

The previous prime is 2100000011. The next prime is 2100000017.

It is a happy number.

2100000012 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (6).

It is not an unprimeable number, because it can be changed into a prime (2100000011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 721689 + ... + 724592.

It is an arithmetic number, because the mean of its divisors is an integer number (149609838).

Almost surely, 2^2100000012 is an apocalyptic number.

2100000012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2100000012 is an abundant number, since it is smaller than the sum of its proper divisors (3285954156).

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

2100000012 is a wasteful number, since it uses less digits than its factorization.

2100000012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1446310 (or 1446297 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 6.

The square root of 2100000012 is about 45825.7570804891. The cubic root of 2100000012 is about 1280.5791674267.

It can be divided in two parts, 21000000 and 12, that added together give a palindrome (21000012).

The spelling of 2100000012 in words is "two billion, one hundred million, twelve", and thus it is an aban number.