23121004240343 has 2 divisors, whose sum is σ = 23121004240344. Its totient is φ = 23121004240342.

The previous prime is 23121004240189. The next prime is 23121004240421. The reversal of 23121004240343 is 34304240012132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23121004240343 - 2¹⁴ = 23121004223959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23121004248343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11560502120171 + 11560502120172.

It is an arithmetic number, because the mean of its divisors is an integer number (11560502120172).

Almost surely, 2^{23121004240343} is an apocalyptic number.

23121004240343 is a deficient number, since it is larger than the sum of its proper divisors (1).

23121004240343 is an equidigital number, since it uses as much as digits as its factorization.

23121004240343 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 23121004240343 its reverse (34304240012132), we get a palindrome (57425244252475).

The spelling of 23121004240343 in words is "twenty-three trillion, one hundred twenty-one billion, four million, two hundred forty thousand, three hundred forty-three".