212000311231 has 4 divisors (see below), whose sum is σ = 224470917792. Its totient is φ = 199529704672.

The previous prime is 212000311207. The next prime is 212000311253. The reversal of 212000311231 is 132113000212.

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 212000311231 - 2⁹ = 212000310719 is a prime.

It is a super-2 number, since 2×212000311231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212000311031) 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, 6235303255 + ... + 6235303288.

It is an arithmetic number, because the mean of its divisors is an integer number (56117729448).

Almost surely, 2^212000311231 is an apocalyptic number.

212000311231 is a deficient number, since it is larger than the sum of its proper divisors (12470606561).

212000311231 is a wasteful number, since it uses less digits than its factorization.

212000311231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12470606560.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 212000311231 its reverse (132113000212), we get a palindrome (344113311443).

The spelling of 212000311231 in words is "two hundred twelve billion, three hundred eleven thousand, two hundred thirty-one".