21324214102231 has 4 divisors (see below), whose sum is σ = 21326132275992. Its totient is φ = 21322295928472.

The previous prime is 21324214102211. The next prime is 21324214102237. The reversal of 21324214102231 is 13220141242312.

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 21324214102231 - 2¹¹ = 21324214100183 is a prime.

It is a super-2 number, since 2×21324214102231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21324214102231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21324214102237) 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, 959070205 + ... + 959092438.

It is an arithmetic number, because the mean of its divisors is an integer number (5331533068998).

Almost surely, 2^{21324214102231} is an apocalyptic number.

21324214102231 is a deficient number, since it is larger than the sum of its proper divisors (1918173761).

21324214102231 is a wasteful number, since it uses less digits than its factorization.

21324214102231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1918173760.

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 21324214102231 its reverse (13220141242312), we get a palindrome (34544355344543).

The spelling of 21324214102231 in words is "twenty-one trillion, three hundred twenty-four billion, two hundred fourteen million, one hundred two thousand, two hundred thirty-one".