2100001012 has 12 divisors (see below), whose sum is σ = 3801726180. Its totient is φ = 1013793536.

The previous prime is 2100000997. The next prime is 2100001021. The reversal of 2100001012 is 2101000012.

It can be written as a sum of positive squares in 2 ways, for example, as 919666276 + 1180334736 = 30326^2 + 34356^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2100000986 and 2100001004.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 9051613 + ... + 9051844.

It is an arithmetic number, because the mean of its divisors is an integer number (316810515).

Almost surely, 2^2100001012 is an apocalyptic number.

It is an amenable number.

2100001012 is a deficient number, since it is larger than the sum of its proper divisors (1701725168).

2100001012 is a wasteful number, since it uses less digits than its factorization.

2100001012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18103490 (or 18103488 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 2100001012 is about 45825.7679913823. The cubic root of 2100001012 is about 1280.5793706932.

Adding to 2100001012 its reverse (2101000012), we get a palindrome (4201001024).

The spelling of 2100001012 in words is "two billion, one hundred million, one thousand, twelve".