21320211313231 has 8 divisors (see below), whose sum is σ = 21322860888384. Its totient is φ = 21317561934240.

The previous prime is 21320211313229. The next prime is 21320211313277. The reversal of 21320211313231 is 13231311202312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21320211313231 - 2¹ = 21320211313229 is a prime.

It is a super-2 number, since 2×21320211313231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21320211313196 and 21320211313205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21320211313201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 357314106 + ... + 357373768.

It is an arithmetic number, because the mean of its divisors is an integer number (2665357611048).

Almost surely, 2^{21320211313231} is an apocalyptic number.

21320211313231 is a deficient number, since it is larger than the sum of its proper divisors (2649575153).

21320211313231 is a wasteful number, since it uses less digits than its factorization.

21320211313231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98081.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 21320211313231 its reverse (13231311202312), we get a palindrome (34551522515543).

The spelling of 21320211313231 in words is "twenty-one trillion, three hundred twenty billion, two hundred eleven million, three hundred thirteen thousand, two hundred thirty-one".