400211121111917 has 2 divisors, whose sum is σ = 400211121111918. Its totient is φ = 400211121111916.

The previous prime is 400211121111913. The next prime is 400211121112021. The reversal of 400211121111917 is 719111121112004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 398369425129636 + 1841695982281 = 19959194^2 + 1357091^2 .

It is a cyclic number.

It is not a de Polignac number, because 400211121111917 - 2² = 400211121111913 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400211121111913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200105560555958 + 200105560555959.

It is an arithmetic number, because the mean of its divisors is an integer number (200105560555959).

Almost surely, 2^{400211121111917} is an apocalyptic number.

It is an amenable number.

400211121111917 is a deficient number, since it is larger than the sum of its proper divisors (1).

400211121111917 is an equidigital number, since it uses as much as digits as its factorization.

400211121111917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 32.

The spelling of 400211121111917 in words is "four hundred trillion, two hundred eleven billion, one hundred twenty-one million, one hundred eleven thousand, nine hundred seventeen".