43010111001001 has 2 divisors, whose sum is σ = 43010111001002. Its totient is φ = 43010111001000.

The previous prime is 43010111000999. The next prime is 43010111001023. The reversal of 43010111001001 is 10010011101034.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40859914014976 + 2150196986025 = 6392176^2 + 1466355^2 .

It is a cyclic number.

It is not a de Polignac number, because 43010111001001 - 2¹ = 43010111000999 is a prime.

Together with 43010111000999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (43010111007001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21505055500500 + 21505055500501.

It is an arithmetic number, because the mean of its divisors is an integer number (21505055500501).

Almost surely, 2^{43010111001001} is an apocalyptic number.

It is an amenable number.

43010111001001 is a deficient number, since it is larger than the sum of its proper divisors (1).

43010111001001 is an equidigital number, since it uses as much as digits as its factorization.

43010111001001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 43010111001001 its reverse (10010011101034), we get a palindrome (53020122102035).

The spelling of 43010111001001 in words is "forty-three trillion, ten billion, one hundred eleven million, one thousand, one".