400011215111 has 2 divisors, whose sum is σ = 400011215112. Its totient is φ = 400011215110.

The previous prime is 400011215063. The next prime is 400011215171. The reversal of 400011215111 is 111512110004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 400011215111 - 2²² = 400007020807 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 400011215111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400011215171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200005607555 + 200005607556.

It is an arithmetic number, because the mean of its divisors is an integer number (200005607556).

Almost surely, 2^400011215111 is an apocalyptic number.

400011215111 is a deficient number, since it is larger than the sum of its proper divisors (1).

400011215111 is an equidigital number, since it uses as much as digits as its factorization.

400011215111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40, while the sum is 17.

Adding to 400011215111 its reverse (111512110004), we get a palindrome (511523325115).

The spelling of 400011215111 in words is "four hundred billion, eleven million, two hundred fifteen thousand, one hundred eleven".