21313101 has 8 divisors (see below), whose sum is σ = 28899360. Its totient is φ = 13967792.

The previous prime is 21313093. The next prime is 21313129. The reversal of 21313101 is 10131312.

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 21313101 - 2³ = 21313093 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21313181) 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, 60030 + ... + 60383.

It is an arithmetic number, because the mean of its divisors is an integer number (3612420).

Almost surely, 2^21313101 is an apocalyptic number.

It is an amenable number.

21313101 is a deficient number, since it is larger than the sum of its proper divisors (7586259).

21313101 is a wasteful number, since it uses less digits than its factorization.

21313101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120475.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 21313101 is about 4616.6114196454. The cubic root of 21313101 is about 277.2568050307.

Adding to 21313101 its reverse (10131312), we get a palindrome (31444413).

The spelling of 21313101 in words is "twenty-one million, three hundred thirteen thousand, one hundred one".