21410121 has 8 divisors (see below), whose sum is σ = 28949184. Its totient is φ = 14072240.

The previous prime is 21410117. The next prime is 21410141. The reversal of 21410121 is 12101412.

It is a happy number.

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 21410121 - 2² = 21410117 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 21410097 and 21410106.

It is not an unprimeable number, because it can be changed into a prime (21410111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50046 + ... + 50471.

It is an arithmetic number, because the mean of its divisors is an integer number (3618648).

Almost surely, 2^21410121 is an apocalyptic number.

It is an amenable number.

21410121 is a deficient number, since it is larger than the sum of its proper divisors (7539063).

21410121 is a wasteful number, since it uses less digits than its factorization.

21410121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100591.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 21410121 is about 4627.1071956461. The cubic root of 21410121 is about 277.6768712540.

Adding to 21410121 its reverse (12101412), we get a palindrome (33511533).

The spelling of 21410121 in words is "twenty-one million, four hundred ten thousand, one hundred twenty-one".