21113150 has 48 divisors (see below), whose sum is σ = 42385680. Its totient is φ = 7795200.

The previous prime is 21113119. The next prime is 21113153. The reversal of 21113150 is 5131112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21113153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49940 + ... + 50360.

It is an arithmetic number, because the mean of its divisors is an integer number (883035).

Almost surely, 2^21113150 is an apocalyptic number.

21113150 is an abundant number, since it is smaller than the sum of its proper divisors (21272530).

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

21113150 is a wasteful number, since it uses less digits than its factorization.

21113150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509 (or 504 counting only the distinct ones).

The product of its (nonzero) digits is 30, while the sum is 14.

The square root of 21113150 is about 4594.9047868264. The cubic root of 21113150 is about 276.3870418787.

Adding to 21113150 its reverse (5131112), we get a palindrome (26244262).

The spelling of 21113150 in words is "twenty-one million, one hundred thirteen thousand, one hundred fifty".