10212000021 has 16 divisors (see below), whose sum is σ = 15139163520. Its totient is φ = 6803376480.

The previous prime is 10211999947. The next prime is 10212000031. The reversal of 10212000021 is 12000021201.

It is not a de Polignac number, because 10212000021 - 2⁷ = 10211999893 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 10211999967 and 10212000012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10212000031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87705 + ... + 167678.

It is an arithmetic number, because the mean of its divisors is an integer number (946197720).

Almost surely, 2^10212000021 is an apocalyptic number.

It is an amenable number.

10212000021 is a deficient number, since it is larger than the sum of its proper divisors (4927163499).

10212000021 is a wasteful number, since it uses less digits than its factorization.

10212000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256873 (or 256867 counting only the distinct ones).

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

Adding to 10212000021 its reverse (12000021201), we get a palindrome (22212021222).

The spelling of 10212000021 in words is "ten billion, two hundred twelve million, twenty-one", and thus it is an aban number.