21114601 has 4 divisors (see below), whose sum is σ = 21460804. Its totient is φ = 20768400.

The previous prime is 21114589. The next prime is 21114607. The reversal of 21114601 is 10641112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 648025 + 20466576 = 805^2 + 4524^2 .

It is a cyclic number.

It is not a de Polignac number, because 21114601 - 2⁹ = 21114089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21114607) 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, 173010 + ... + 173131.

It is an arithmetic number, because the mean of its divisors is an integer number (5365201).

Almost surely, 2^21114601 is an apocalyptic number.

It is an amenable number.

21114601 is a deficient number, since it is larger than the sum of its proper divisors (346203).

21114601 is an equidigital number, since it uses as much as digits as its factorization.

21114601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346202.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 21114601 is about 4595.0626763952. The cubic root of 21114601 is about 276.3933732947.

Adding to 21114601 its reverse (10641112), we get a palindrome (31755713).

The spelling of 21114601 in words is "twenty-one million, one hundred fourteen thousand, six hundred one".