10200000021 has 16 divisors (see below), whose sum is σ = 13814604864. Its totient is φ = 6693508224.

The previous prime is 10199999993. The next prime is 10200000059. The reversal of 10200000021 is 12000000201.

It is a happy number.

It is not a de Polignac number, because 10200000021 - 2²³ = 10191611413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10199999955 and 10200000009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10200000721) 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, 50800 + ... + 151593.

It is an arithmetic number, because the mean of its divisors is an integer number (863412804).

Almost surely, 2^10200000021 is an apocalyptic number.

It is an amenable number.

10200000021 is a deficient number, since it is larger than the sum of its proper divisors (3614604843).

10200000021 is a wasteful number, since it uses less digits than its factorization.

10200000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202660.

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

Adding to 10200000021 its reverse (12000000201), we get a palindrome (22200000222).

The spelling of 10200000021 in words is "ten billion, two hundred million, twenty-one", and thus it is an aban number.