23201111449 has 2 divisors, whose sum is σ = 23201111450. Its totient is φ = 23201111448.

The previous prime is 23201111411. The next prime is 23201111477. The reversal of 23201111449 is 94411110232.

It is an a-pointer prime, because the next prime (23201111477) can be obtained adding 23201111449 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22427159049 + 773952400 = 149757^2 + 27820^2 .

It is a cyclic number.

It is not a de Polignac number, because 23201111449 - 2⁹ = 23201110937 is a prime.

It is not a weakly prime, because it can be changed into another prime (23201181449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11600555724 + 11600555725.

It is an arithmetic number, because the mean of its divisors is an integer number (11600555725).

Almost surely, 2^23201111449 is an apocalyptic number.

It is an amenable number.

23201111449 is a deficient number, since it is larger than the sum of its proper divisors (1).

23201111449 is an equidigital number, since it uses as much as digits as its factorization.

23201111449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 28.

The spelling of 23201111449 in words is "twenty-three billion, two hundred one million, one hundred eleven thousand, four hundred forty-nine".