212131202111 has 4 divisors (see below), whose sum is σ = 212135407800. Its totient is φ = 212126996424.

The previous prime is 212131202081. The next prime is 212131202113. The reversal of 212131202111 is 111202131212.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212131202111 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 212131202111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212131202113) 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, 2026256 + ... + 2128373.

It is an arithmetic number, because the mean of its divisors is an integer number (53033851950).

Almost surely, 2^212131202111 is an apocalyptic number.

212131202111 is a deficient number, since it is larger than the sum of its proper divisors (4205689).

212131202111 is an equidigital number, since it uses as much as digits as its factorization.

212131202111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4205688.

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

Adding to 212131202111 its reverse (111202131212), we get a palindrome (323333333323).

The spelling of 212131202111 in words is "two hundred twelve billion, one hundred thirty-one million, two hundred two thousand, one hundred eleven".