21320230231211 has 8 divisors (see below), whose sum is σ = 21801519091200. Its totient is φ = 20840094160488.

The previous prime is 21320230231187. The next prime is 21320230231217. The reversal of 21320230231211 is 11213203202312.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21320230231211 is a prime.

It is a super-2 number, since 2×21320230231211² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21320230231217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 288159911 + ... + 288233888.

It is an arithmetic number, because the mean of its divisors is an integer number (2725189886400).

Almost surely, 2^{21320230231211} is an apocalyptic number.

21320230231211 is a deficient number, since it is larger than the sum of its proper divisors (481288859989).

21320230231211 is an equidigital number, since it uses as much as digits as its factorization.

21320230231211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576394633.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 21320230231211 its reverse (11213203202312), we get a palindrome (32533433433523).

The spelling of 21320230231211 in words is "twenty-one trillion, three hundred twenty billion, two hundred thirty million, two hundred thirty-one thousand, two hundred eleven".