21411120 has 40 divisors (see below), whose sum is σ = 66375216. Its totient is φ = 5709568.

The previous prime is 21411107. The next prime is 21411149. The reversal of 21411120 is 2111412.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 21411096 and 21411105.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 44367 + ... + 44846.

Almost surely, 2^21411120 is an apocalyptic number.

21411120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21411120 is an abundant number, since it is smaller than the sum of its proper divisors (44964096).

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

21411120 is a wasteful number, since it uses less digits than its factorization.

21411120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89229 (or 89223 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 21411120 is about 4627.2151452034. The cubic root of 21411120 is about 277.6811900040.

Adding to 21411120 its reverse (2111412), we get a palindrome (23522532).

The spelling of 21411120 in words is "twenty-one million, four hundred eleven thousand, one hundred twenty".