21320132443213 has 4 divisors (see below), whose sum is σ = 21320346688480. Its totient is φ = 21319918197948.

The previous prime is 21320132443193. The next prime is 21320132443217. The reversal of 21320132443213 is 31234423102312.

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 21320132443213 - 2³³ = 21311542508621 is a prime.

It is a super-2 number, since 2×21320132443213² (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 (21320132443217) 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, 106973295 + ... + 107172412.

It is an arithmetic number, because the mean of its divisors is an integer number (5330086672120).

Almost surely, 2^{21320132443213} is an apocalyptic number.

It is an amenable number.

21320132443213 is a deficient number, since it is larger than the sum of its proper divisors (214245267).

21320132443213 is an equidigital number, since it uses as much as digits as its factorization.

21320132443213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214245266.

The product of its (nonzero) digits is 20736, while the sum is 31.

Adding to 21320132443213 its reverse (31234423102312), we get a palindrome (52554555545525).

The spelling of 21320132443213 in words is "twenty-one trillion, three hundred twenty billion, one hundred thirty-two million, four hundred forty-three thousand, two hundred thirteen".