212311131211 has 4 divisors (see below), whose sum is σ = 212318715672. Its totient is φ = 212303546752.

The previous prime is 212311131199. The next prime is 212311131247. The reversal of 212311131211 is 112131113212.

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 212311131211 - 2¹³ = 212311123019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212311731211) 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, 3750085 + ... + 3806278.

It is an arithmetic number, because the mean of its divisors is an integer number (53079678918).

Almost surely, 2^212311131211 is an apocalyptic number.

212311131211 is a deficient number, since it is larger than the sum of its proper divisors (7584461).

212311131211 is an equidigital number, since it uses as much as digits as its factorization.

212311131211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7584460.

The product of its digits is 72, while the sum is 19.

Adding to 212311131211 its reverse (112131113212), we get a palindrome (324442244423).

The spelling of 212311131211 in words is "two hundred twelve billion, three hundred eleven million, one hundred thirty-one thousand, two hundred eleven".