21313403132213 has 4 divisors (see below), whose sum is σ = 21313835212908. Its totient is φ = 21312971051520.

The previous prime is 21313403132209. The next prime is 21313403132279. The reversal of 21313403132213 is 31223130431312.

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 14214279853489 + 7099123278724 = 3770183^2 + 2664418^2 .

It is a cyclic number.

It is not a de Polignac number, because 21313403132213 - 2² = 21313403132209 is a prime.

It is a super-2 number, since 2×21313403132213² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21313403132113) 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, 215966348 + ... + 216065013.

It is an arithmetic number, because the mean of its divisors is an integer number (5328458803227).

Almost surely, 2^{21313403132213} is an apocalyptic number.

It is an amenable number.

21313403132213 is a deficient number, since it is larger than the sum of its proper divisors (432080695).

21313403132213 is an equidigital number, since it uses as much as digits as its factorization.

21313403132213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432080694.

The product of its (nonzero) digits is 7776, while the sum is 29.

Adding to 21313403132213 its reverse (31223130431312), we get a palindrome (52536533563525).

The spelling of 21313403132213 in words is "twenty-one trillion, three hundred thirteen billion, four hundred three million, one hundred thirty-two thousand, two hundred thirteen".