212044111405 has 12 divisors (see below), whose sum is σ = 295996270140. Its totient is φ = 145401676224.

The previous prime is 212044111333. The next prime is 212044111417. The reversal of 212044111405 is 504111440212.

It can be written as a sum of positive squares in 2 ways, for example, as 147896392329 + 64147719076 = 384573^2 + 253274^2 .

It is not a de Polignac number, because 212044111405 - 2¹¹ = 212044109357 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212044111405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 432742840 + ... + 432743329.

It is an arithmetic number, because the mean of its divisors is an integer number (24666355845).

Almost surely, 2^212044111405 is an apocalyptic number.

It is an amenable number.

212044111405 is a deficient number, since it is larger than the sum of its proper divisors (83952158735).

212044111405 is an equidigital number, since it uses as much as digits as its factorization.

212044111405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865486188 (or 865486181 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 25.

Adding to 212044111405 its reverse (504111440212), we get a palindrome (716155551617).

The spelling of 212044111405 in words is "two hundred twelve billion, forty-four million, one hundred eleven thousand, four hundred five".