21331103032311 has 4 divisors (see below), whose sum is σ = 28441470709752. Its totient is φ = 14220735354872.

The previous prime is 21331103032297. The next prime is 21331103032321. The reversal of 21331103032311 is 11323030113312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21331103032311 - 2²¹ = 21331100935159 is a prime.

It is a super-2 number, since 2×21331103032311² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21331103032321) 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, 3555183838716 + ... + 3555183838721.

It is an arithmetic number, because the mean of its divisors is an integer number (7110367677438).

Almost surely, 2^{21331103032311} is an apocalyptic number.

21331103032311 is a deficient number, since it is larger than the sum of its proper divisors (7110367677441).

21331103032311 is an equidigital number, since it uses as much as digits as its factorization.

21331103032311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7110367677440.

The product of its (nonzero) digits is 972, while the sum is 24.

Adding to 21331103032311 its reverse (11323030113312), we get a palindrome (32654133145623).

The spelling of 21331103032311 in words is "twenty-one trillion, three hundred thirty-one billion, one hundred three million, thirty-two thousand, three hundred eleven".