212331023 has 4 divisors (see below), whose sum is σ = 223506360. Its totient is φ = 201155688.

The previous prime is 212330999. The next prime is 212331089. The reversal of 212331023 is 320133212.

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 212331023 - 2¹² = 212326927 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212330992 and 212331010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212331323) 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, 5587640 + ... + 5587677.

It is an arithmetic number, because the mean of its divisors is an integer number (55876590).

Almost surely, 2^212331023 is an apocalyptic number.

212331023 is a deficient number, since it is larger than the sum of its proper divisors (11175337).

212331023 is a wasteful number, since it uses less digits than its factorization.

212331023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11175336.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 212331023 is about 14571.5827211734. The cubic root of 212331023 is about 596.5833805219.

Adding to 212331023 its reverse (320133212), we get a palindrome (532464235).

The spelling of 212331023 in words is "two hundred twelve million, three hundred thirty-one thousand, twenty-three".