21101417 has 4 divisors (see below), whose sum is σ = 21162576. Its totient is φ = 21040260.

The previous prime is 21101411. The next prime is 21101441. The reversal of 21101417 is 71410112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21101417 - 2⁴ = 21101401 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21101395 and 21101404.

It is not an unprimeable number, because it can be changed into a prime (21101411) 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, 30059 + ... + 30752.

It is an arithmetic number, because the mean of its divisors is an integer number (5290644).

Almost surely, 2^21101417 is an apocalyptic number.

It is an amenable number.

21101417 is a deficient number, since it is larger than the sum of its proper divisors (61159).

21101417 is an equidigital number, since it uses as much as digits as its factorization.

21101417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61158.

The product of its (nonzero) digits is 56, while the sum is 17.

The square root of 21101417 is about 4593.6278691248. The cubic root of 21101417 is about 276.3358344550.

Adding to 21101417 its reverse (71410112), we get a palindrome (92511529).

The spelling of 21101417 in words is "twenty-one million, one hundred one thousand, four hundred seventeen".