400211121111913 has 2 divisors, whose sum is σ = 400211121111914. Its totient is φ = 400211121111912.

The previous prime is 400211121111889. The next prime is 400211121111917. The reversal of 400211121111913 is 319111121112004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 350151930248409 + 50059190863504 = 18712347^2 + 7075252^2 .

It is a cyclic number.

It is not a de Polignac number, because 400211121111913 - 2³³ = 400202531177321 is a prime.

It is not a weakly prime, because it can be changed into another prime (400211121111917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200105560555956 + 200105560555957.

It is an arithmetic number, because the mean of its divisors is an integer number (200105560555957).

Almost surely, 2^{400211121111913} is an apocalyptic number.

It is an amenable number.

400211121111913 is a deficient number, since it is larger than the sum of its proper divisors (1).

400211121111913 is an equidigital number, since it uses as much as digits as its factorization.

400211121111913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 28.

Adding to 400211121111913 its reverse (319111121112004), we get a palindrome (719322242223917).

The spelling of 400211121111913 in words is "four hundred trillion, two hundred eleven billion, one hundred twenty-one million, one hundred eleven thousand, nine hundred thirteen".