23201444343421 has 4 divisors (see below), whose sum is σ = 23209180740000. Its totient is φ = 23193707946844.

The previous prime is 23201444343403. The next prime is 23201444343437. The reversal of 23201444343421 is 12434344410232.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23201444343421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23201444343481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3868193791 + ... + 3868199788.

It is an arithmetic number, because the mean of its divisors is an integer number (5802295185000).

Almost surely, 2^{23201444343421} is an apocalyptic number.

It is an amenable number.

23201444343421 is a deficient number, since it is larger than the sum of its proper divisors (7736396579).

23201444343421 is an equidigital number, since it uses as much as digits as its factorization.

23201444343421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7736396578.

The product of its (nonzero) digits is 221184, while the sum is 37.

Adding to 23201444343421 its reverse (12434344410232), we get a palindrome (35635788753653).

The spelling of 23201444343421 in words is "twenty-three trillion, two hundred one billion, four hundred forty-four million, three hundred forty-three thousand, four hundred twenty-one".