10021100 has 36 divisors (see below), whose sum is σ = 22696464. Its totient is φ = 3833280.

The previous prime is 10021093. The next prime is 10021111. The reversal of 10021100 is 112001.

It is a happy number.

10021100 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (5).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 122 + ... + 4478.

Almost surely, 2^10021100 is an apocalyptic number.

10021100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10021100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11348232).

10021100 is an abundant number, since it is smaller than the sum of its proper divisors (12675364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10021100 is a wasteful number, since it uses less digits than its factorization.

10021100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4394 (or 4387 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 5.

The square root of 10021100 is about 3165.6121051070. The cubic root of 10021100 is about 215.5948911260.

Adding to 10021100 its reverse (112001), we get a palindrome (10133101).

Subtracting from 10021100 its reverse (112001), we obtain a palindrome (9909099).

The spelling of 10021100 in words is "ten million, twenty-one thousand, one hundred".