21116120 has 32 divisors (see below), whose sum is σ = 47643120. Its totient is φ = 8423040.

The previous prime is 21116119. The next prime is 21116191. The reversal of 21116120 is 2161112.

It is a junction number, because it is equal to n+sod(n) for n = 21116095 and 21116104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25310 + ... + 26130.

Almost surely, 2^21116120 is an apocalyptic number.

21116120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21116120 is an abundant number, since it is smaller than the sum of its proper divisors (26527000).

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

21116120 is a wasteful number, since it uses less digits than its factorization.

21116120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1475 (or 1471 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 21116120 is about 4595.2279595250. The cubic root of 21116120 is about 276.4000011170.

Adding to 21116120 its reverse (2161112), we get a palindrome (23277232).

The spelling of 21116120 in words is "twenty-one million, one hundred sixteen thousand, one hundred twenty".