21114121 has 8 divisors (see below), whose sum is σ = 24421824. Its totient is φ = 17879280.

The previous prime is 21114103. The next prime is 21114127. The reversal of 21114121 is 12141112.

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

It is a cyclic number.

It is not a de Polignac number, because 21114121 - 2⁵ = 21114089 is a prime.

It is a super-2 number, since 2×21114121² = 891612211205282, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21114127) 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, 17590 + ... + 18751.

It is an arithmetic number, because the mean of its divisors is an integer number (3052728).

Almost surely, 2^21114121 is an apocalyptic number.

It is an amenable number.

21114121 is a deficient number, since it is larger than the sum of its proper divisors (3307703).

21114121 is an equidigital number, since it uses as much as digits as its factorization.

21114121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36431.

The product of its digits is 16, while the sum is 13.

The square root of 21114121 is about 4595.0104461252. The cubic root of 21114121 is about 276.3912788543.

Adding to 21114121 its reverse (12141112), we get a palindrome (33255233).

The spelling of 21114121 in words is "twenty-one million, one hundred fourteen thousand, one hundred twenty-one".