10011210021 has 12 divisors (see below), whose sum is σ = 14557689900. Its totient is φ = 6629346240.

The previous prime is 10011210007. The next prime is 10011210037. The reversal of 10011210021 is 12001211001.

It is a happy number.

10011210021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 5800497921 + 4210712100 = 76161^2 + 64890^2 .

It is not a de Polignac number, because 10011210021 - 2⁷ = 10011209893 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 = 10011209985 and 10011210012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10011210071) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 3731400 + ... + 3734081.

It is an arithmetic number, because the mean of its divisors is an integer number (1213140825).

Almost surely, 2^10011210021 is an apocalyptic number.

It is an amenable number.

10011210021 is a deficient number, since it is larger than the sum of its proper divisors (4546479879).

10011210021 is a wasteful number, since it uses less digits than its factorization.

10011210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7465636 (or 7465633 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 10011210021 its reverse (12001211001), we get a palindrome (22012421022).

The spelling of 10011210021 in words is "ten billion, eleven million, two hundred ten thousand, twenty-one".