212201312111 has 4 divisors (see below), whose sum is σ = 212480158224. Its totient is φ = 211922466000.

The previous prime is 212201312093. The next prime is 212201312123. The reversal of 212201312111 is 111213102212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212201312111 - 2⁶ = 212201312047 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212201312111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212201312171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139421915 + ... + 139423436.

It is an arithmetic number, because the mean of its divisors is an integer number (53120039556).

Almost surely, 2^212201312111 is an apocalyptic number.

212201312111 is a deficient number, since it is larger than the sum of its proper divisors (278846113).

212201312111 is an equidigital number, since it uses as much as digits as its factorization.

212201312111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278846112.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 212201312111 its reverse (111213102212), we get a palindrome (323414414323).

It can be divided in two parts, 21220 and 1312111, that added together give a palindrome (1333331).

The spelling of 212201312111 in words is "two hundred twelve billion, two hundred one million, three hundred twelve thousand, one hundred eleven".