21111331330213 has 4 divisors (see below), whose sum is σ = 21111397439200. Its totient is φ = 21111265221228.

The previous prime is 21111331330129. The next prime is 21111331330223. The reversal of 21111331330213 is 31203313311112.

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 21111331330213 - 2⁹ = 21111331329701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21111331330223) 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, 32573145 + ... + 33214942.

It is an arithmetic number, because the mean of its divisors is an integer number (5277849359800).

Almost surely, 2^{21111331330213} is an apocalyptic number.

It is an amenable number.

21111331330213 is a deficient number, since it is larger than the sum of its proper divisors (66108987).

21111331330213 is an equidigital number, since it uses as much as digits as its factorization.

21111331330213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66108986.

The product of its (nonzero) digits is 972, while the sum is 25.

Adding to 21111331330213 its reverse (31203313311112), we get a palindrome (52314644641325).

The spelling of 21111331330213 in words is "twenty-one trillion, one hundred eleven billion, three hundred thirty-one million, three hundred thirty thousand, two hundred thirteen".