10221100 has 36 divisors (see below), whose sum is σ = 22705144. Its totient is φ = 3991680.

The previous prime is 10221091. The next prime is 10221149. The reversal of 10221100 is 112201.

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, 3112 + ... + 5488.

Almost surely, 2^10221100 is an apocalyptic number.

10221100 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 10221100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11352572).

10221100 is an abundant number, since it is smaller than the sum of its proper divisors (12484044).

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

10221100 is a wasteful number, since it uses less digits than its factorization.

10221100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2434 (or 2427 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 10221100 is about 3197.0455110930. The cubic root of 10221100 is about 217.0197268057.

Adding to 10221100 its reverse (112201), we get a palindrome (10333301).

The spelling of 10221100 in words is "ten million, two hundred twenty-one thousand, one hundred".