21201150 has 96 divisors (see below), whose sum is σ = 56960640. Its totient is φ = 5201280.

The previous prime is 21201137. The next prime is 21201157. The reversal of 21201150 is 5110212.

It is a super-2 number, since 2×21201150² = 898977522645000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21201157) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 122464 + ... + 122636.

It is an arithmetic number, because the mean of its divisors is an integer number (593340).

Almost surely, 2^21201150 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21201150, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28480320).

21201150 is an abundant number, since it is smaller than the sum of its proper divisors (35759490).

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

21201150 is a wasteful number, since it uses less digits than its factorization.

21201150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250 (or 245 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 21201150 is about 4604.4706536148. The cubic root of 21201150 is about 276.7705050460.

Adding to 21201150 its reverse (5110212), we get a palindrome (26311362).

The spelling of 21201150 in words is "twenty-one million, two hundred one thousand, one hundred fifty".