23140243230421 has 2 divisors, whose sum is σ = 23140243230422. Its totient is φ = 23140243230420.

The previous prime is 23140243230371. The next prime is 23140243230439. The reversal of 23140243230421 is 12403234204132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11998700199396 + 11141543031025 = 3463914^2 + 3337895^2 .

It is a cyclic number.

It is not a de Polignac number, because 23140243230421 - 2¹⁵ = 23140243197653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23140243230491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11570121615210 + 11570121615211.

It is an arithmetic number, because the mean of its divisors is an integer number (11570121615211).

Almost surely, 2^{23140243230421} is an apocalyptic number.

It is an amenable number.

23140243230421 is a deficient number, since it is larger than the sum of its proper divisors (1).

23140243230421 is an equidigital number, since it uses as much as digits as its factorization.

23140243230421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 31.

Adding to 23140243230421 its reverse (12403234204132), we get a palindrome (35543477434553).

The spelling of 23140243230421 in words is "twenty-three trillion, one hundred forty billion, two hundred forty-three million, two hundred thirty thousand, four hundred twenty-one".