10000021012 has 24 divisors (see below), whose sum is σ = 17598964320. Its totient is φ = 4971801120.

The previous prime is 10000021007. The next prime is 10000021039. The reversal of 10000021012 is 21012000001.

It is a junction number, because it is equal to n+sod(n) for n = 10000020986 and 10000021004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 773562 + ... + 786382.

It is an arithmetic number, because the mean of its divisors is an integer number (733290180).

Almost surely, 2^10000021012 is an apocalyptic number.

It is an amenable number.

10000021012 is a deficient number, since it is larger than the sum of its proper divisors (7598943308).

10000021012 is a wasteful number, since it uses less digits than its factorization.

10000021012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13911 (or 13909 counting only the distinct ones).

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

Adding to 10000021012 its reverse (21012000001), we get a palindrome (31012021013).

The spelling of 10000021012 in words is "ten billion, twenty-one thousand, twelve".