21124102 has 8 divisors (see below), whose sum is σ = 32459112. Its totient is φ = 10304400.

The previous prime is 21124099. The next prime is 21124123. The reversal of 21124102 is 20142112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128724 + ... + 128887.

It is an arithmetic number, because the mean of its divisors is an integer number (4057389).

Almost surely, 2^21124102 is an apocalyptic number.

21124102 is a deficient number, since it is larger than the sum of its proper divisors (11335010).

21124102 is a wasteful number, since it uses less digits than its factorization.

21124102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257654.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 21124102 is about 4596.0963871529. The cubic root of 21124102 is about 276.4348235951.

Adding to 21124102 its reverse (20142112), we get a palindrome (41266214).

The spelling of 21124102 in words is "twenty-one million, one hundred twenty-four thousand, one hundred two".