212323231331 has 4 divisors (see below), whose sum is σ = 224812833192. Its totient is φ = 199833629472.

The previous prime is 212323231327. The next prime is 212323231363. The reversal of 212323231331 is 133132323212.

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 212323231331 - 2² = 212323231327 is a prime.

It is a super-2 number, since 2×212323231331² (a number of 23 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 212323231331.

It is not an unprimeable number, because it can be changed into a prime (212323231301) 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, 6244800905 + ... + 6244800938.

It is an arithmetic number, because the mean of its divisors is an integer number (56203208298).

Almost surely, 2^212323231331 is an apocalyptic number.

212323231331 is a deficient number, since it is larger than the sum of its proper divisors (12489601861).

212323231331 is a wasteful number, since it uses less digits than its factorization.

212323231331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12489601860.

The product of its digits is 3888, while the sum is 26.

Adding to 212323231331 its reverse (133132323212), we get a palindrome (345455554543).

The spelling of 212323231331 in words is "two hundred twelve billion, three hundred twenty-three million, two hundred thirty-one thousand, three hundred thirty-one".