23420111321 has 2 divisors, whose sum is σ = 23420111322. Its totient is φ = 23420111320.

The previous prime is 23420111287. The next prime is 23420111401. The reversal of 23420111321 is 12311102432.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16657516096 + 6762595225 = 129064^2 + 82235^2 .

It is a cyclic number.

It is not a de Polignac number, because 23420111321 - 2⁶ = 23420111257 is a prime.

It is a super-3 number, since 3×23420111321³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 23420111293 and 23420111302.

It is not a weakly prime, because it can be changed into another prime (23420111521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11710055660 + 11710055661.

It is an arithmetic number, because the mean of its divisors is an integer number (11710055661).

Almost surely, 2^23420111321 is an apocalyptic number.

It is an amenable number.

23420111321 is a deficient number, since it is larger than the sum of its proper divisors (1).

23420111321 is an equidigital number, since it uses as much as digits as its factorization.

23420111321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 23420111321 its reverse (12311102432), we get a palindrome (35731213753).

The spelling of 23420111321 in words is "twenty-three billion, four hundred twenty million, one hundred eleven thousand, three hundred twenty-one".