21101324 has 24 divisors (see below), whose sum is σ = 39270000. Its totient is φ = 9892800.

The previous prime is 21101323. The next prime is 21101341. The reversal of 21101324 is 42310112.

It is a junction number, because it is equal to n+sod(n) for n = 21101299 and 21101308.

It is not an unprimeable number, because it can be changed into a prime (21101323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6302 + ... + 9050.

It is an arithmetic number, because the mean of its divisors is an integer number (1636250).

Almost surely, 2^21101324 is an apocalyptic number.

It is an amenable number.

21101324 is a deficient number, since it is larger than the sum of its proper divisors (18168676).

21101324 is a wasteful number, since it uses less digits than its factorization.

21101324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2873 (or 2871 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 21101324 is about 4593.6177463955. The cubic root of 21101324 is about 276.3354284906.

Adding to 21101324 its reverse (42310112), we get a palindrome (63411436).

The spelling of 21101324 in words is "twenty-one million, one hundred one thousand, three hundred twenty-four".