21123114 has 8 divisors (see below), whose sum is σ = 42246240. Its totient is φ = 7041036.

The previous prime is 21123103. The next prime is 21123119. The reversal of 21123114 is 41132112.

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

21123114 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 21123093 and 21123102.

It is not an unprimeable number, because it can be changed into a prime (21123119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1760254 + ... + 1760265.

It is an arithmetic number, because the mean of its divisors is an integer number (5280780).

Almost surely, 2^21123114 is an apocalyptic number.

21123114 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21123114 is a wasteful number, since it uses less digits than its factorization.

21123114 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3520524.

The product of its digits is 48, while the sum is 15.

The square root of 21123114 is about 4595.9889033809. The cubic root of 21123114 is about 276.4305137967.

Adding to 21123114 its reverse (41132112), we get a palindrome (62255226).

The spelling of 21123114 in words is "twenty-one million, one hundred twenty-three thousand, one hundred fourteen".