212130321311231 has 4 divisors (see below), whose sum is σ = 213554014743000. Its totient is φ = 210706627879464.

The previous prime is 212130321311213. The next prime is 212130321311239. The reversal of 212130321311231 is 132113123031212.

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 212130321311231 - 2⁴⁶ = 141761577133567 is a prime.

It is a super-2 number, since 2×212130321311231² (a number of 29 digits) contains 22 as substring.

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 212130321311231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212130321311239) 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, 711846715661 + ... + 711846715958.

It is an arithmetic number, because the mean of its divisors is an integer number (53388503685750).

Almost surely, 2^{212130321311231} is an apocalyptic number.

212130321311231 is a deficient number, since it is larger than the sum of its proper divisors (1423693431769).

212130321311231 is a wasteful number, since it uses less digits than its factorization.

212130321311231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1423693431768.

The product of its (nonzero) digits is 1296, while the sum is 26.

Adding to 212130321311231 its reverse (132113123031212), we get a palindrome (344243444342443).

The spelling of 212130321311231 in words is "two hundred twelve trillion, one hundred thirty billion, three hundred twenty-one million, three hundred eleven thousand, two hundred thirty-one".