21106124 has 24 divisors (see below), whose sum is σ = 39925200. Its totient is φ = 9705024.

The previous prime is 21106121. The next prime is 21106147. The reversal of 21106124 is 42160112.

It is not an unprimeable number, because it can be changed into a prime (21106121) 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, 17567 + ... + 18729.

It is an arithmetic number, because the mean of its divisors is an integer number (1663550).

Almost surely, 2^21106124 is an apocalyptic number.

It is an amenable number.

21106124 is a deficient number, since it is larger than the sum of its proper divisors (18819076).

21106124 is a wasteful number, since it uses less digits than its factorization.

21106124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1529 (or 1527 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 21106124 is about 4594.1401807085. The cubic root of 21106124 is about 276.3563799326.

Adding to 21106124 its reverse (42160112), we get a palindrome (63266236).

It can be divided in two parts, 2110612 and 4, that multiplied together give a palindrome (8442448).

The spelling of 21106124 in words is "twenty-one million, one hundred six thousand, one hundred twenty-four".