212133443231 has 4 divisors (see below), whose sum is σ = 212147931072. Its totient is φ = 212118955392.

The previous prime is 212133443201. The next prime is 212133443239. The reversal of 212133443231 is 132344331212.

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 212133443231 - 2¹⁸ = 212133181087 is a prime.

It is a super-2 number, since 2×212133443231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212133443194 and 212133443203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212133443239) 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, 7221935 + ... + 7251248.

It is an arithmetic number, because the mean of its divisors is an integer number (53036982768).

Almost surely, 2^212133443231 is an apocalyptic number.

212133443231 is a deficient number, since it is larger than the sum of its proper divisors (14487841).

212133443231 is a wasteful number, since it uses less digits than its factorization.

212133443231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14487840.

The product of its digits is 10368, while the sum is 29.

Adding to 212133443231 its reverse (132344331212), we get a palindrome (344477774443).

The spelling of 212133443231 in words is "two hundred twelve billion, one hundred thirty-three million, four hundred forty-three thousand, two hundred thirty-one".