21111332323013 has 4 divisors (see below), whose sum is σ = 21146112113280. Its totient is φ = 21076552532748.

The previous prime is 21111332323009. The next prime is 21111332323061. The reversal of 21111332323013 is 31032323311112.

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 21111332323013 - 2² = 21111332323009 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 (21111332323073) 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, 17389894223 + ... + 17389895436.

It is an arithmetic number, because the mean of its divisors is an integer number (5286528028320).

Almost surely, 2^{21111332323013} is an apocalyptic number.

It is an amenable number.

21111332323013 is a deficient number, since it is larger than the sum of its proper divisors (34779790267).

21111332323013 is an equidigital number, since it uses as much as digits as its factorization.

21111332323013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34779790266.

The product of its (nonzero) digits is 1944, while the sum is 26.

Adding to 21111332323013 its reverse (31032323311112), we get a palindrome (52143655634125).

The spelling of 21111332323013 in words is "twenty-one trillion, one hundred eleven billion, three hundred thirty-two million, three hundred twenty-three thousand, thirteen".