21313011 has 8 divisors (see below), whose sum is σ = 28483840. Its totient is φ = 14175432.

The previous prime is 21313001. The next prime is 21313021. The reversal of 21313011 is 11031312.

It is an interprime number because it is at equal distance from previous prime (21313001) and next prime (21313021).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21313011 - 2⁵ = 21312979 is a prime.

It is a super-2 number, since 2×21313011² = 908488875772242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21313001) 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, 6775 + ... + 9408.

It is an arithmetic number, because the mean of its divisors is an integer number (3560480).

Almost surely, 2^21313011 is an apocalyptic number.

21313011 is a deficient number, since it is larger than the sum of its proper divisors (7170829).

21313011 is a wasteful number, since it uses less digits than its factorization.

21313011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16625.

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

The square root of 21313011 is about 4616.6016722260. The cubic root of 21313011 is about 277.2564147676.

Adding to 21313011 its reverse (11031312), we get a palindrome (32344323).

The spelling of 21313011 in words is "twenty-one million, three hundred thirteen thousand, eleven".