1021000012 has 12 divisors (see below), whose sum is σ = 1793110536. Its totient is φ = 508682720.

The previous prime is 1021000009. The next prime is 1021000027. The reversal of 1021000012 is 2100001201.

It is a junction number, because it is equal to n+sod(n) for n = 1020999959 and 1021000004.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 453058 + ... + 455305.

It is an arithmetic number, because the mean of its divisors is an integer number (149425878).

Almost surely, 2^1021000012 is an apocalyptic number.

It is an amenable number.

1021000012 is a deficient number, since it is larger than the sum of its proper divisors (772110524).

1021000012 is a wasteful number, since it uses less digits than its factorization.

1021000012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 908648 (or 908646 counting only the distinct ones).

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

The square root of 1021000012 is about 31953.0908051162. The cubic root of 1021000012 is about 1006.9515677296.

Adding to 1021000012 its reverse (2100001201), we get a palindrome (3121001213).

The spelling of 1021000012 in words is "one billion, twenty-one million, twelve", and thus it is an aban number and an uban number.