21322113 has 4 divisors (see below), whose sum is σ = 28429488. Its totient is φ = 14214740.

The previous prime is 21322099. The next prime is 21322117. The reversal of 21322113 is 31122312.

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 21322113 - 2¹⁰ = 21321089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21322092 and 21322101.

It is not an unprimeable number, because it can be changed into a prime (21322117) 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, 3553683 + ... + 3553688.

It is an arithmetic number, because the mean of its divisors is an integer number (7107372).

Almost surely, 2^21322113 is an apocalyptic number.

It is an amenable number.

21322113 is a deficient number, since it is larger than the sum of its proper divisors (7107375).

21322113 is an equidigital number, since it uses as much as digits as its factorization.

21322113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7107374.

The product of its digits is 72, while the sum is 15.

The square root of 21322113 is about 4617.5873570513. The cubic root of 21322113 is about 277.2958778094.

Adding to 21322113 its reverse (31122312), we get a palindrome (52444425).

The spelling of 21322113 in words is "twenty-one million, three hundred twenty-two thousand, one hundred thirteen".