21120601 has 8 divisors (see below), whose sum is σ = 22190400. Its totient is φ = 20063472.

The previous prime is 21120587. The next prime is 21120607. The reversal of 21120601 is 10602112.

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 21120601 - 2⁹ = 21120089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21120607) 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, 346 + ... + 6508.

It is an arithmetic number, because the mean of its divisors is an integer number (2773800).

Almost surely, 2^21120601 is an apocalyptic number.

It is an amenable number.

21120601 is a deficient number, since it is larger than the sum of its proper divisors (1069799).

21120601 is a wasteful number, since it uses less digits than its factorization.

21120601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6335.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 21120601 is about 4595.7155046848. The cubic root of 21120601 is about 276.4195511228.

Adding to 21120601 its reverse (10602112), we get a palindrome (31722713).

The spelling of 21120601 in words is "twenty-one million, one hundred twenty thousand, six hundred one".