10111200021 has 48 divisors (see below), whose sum is σ = 16098264000. Its totient is φ = 6077719296.

The previous prime is 10111200019. The next prime is 10111200053. The reversal of 10111200021 is 12000211101.

It is a happy number.

10111200021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10111200021 - 2¹ = 10111200019 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 = 10111199976 and 10111200012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10111200061) 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 47 ways as a sum of consecutive naturals, for example, 858430 + ... + 870128.

It is an arithmetic number, because the mean of its divisors is an integer number (335380500).

Almost surely, 2^10111200021 is an apocalyptic number.

It is an amenable number.

10111200021 is a deficient number, since it is larger than the sum of its proper divisors (5987063979).

10111200021 is a wasteful number, since it uses less digits than its factorization.

10111200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11890 (or 11887 counting only the distinct ones).

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

Adding to 10111200021 its reverse (12000211101), we get a palindrome (22111411122).

The spelling of 10111200021 in words is "ten billion, one hundred eleven million, two hundred thousand, twenty-one".