212121132031233 has 20 divisors (see below), whose sum is σ = 333549798258160. Its totient is φ = 133971241281912.

The previous prime is 212121132031217. The next prime is 212121132031243. The reversal of 212121132031233 is 332130231121212.

212121132031233 is a `hidden beast` number, since 2 + 1 + 2 + 1 + 21 + 1 + 320 + 312 + 3 + 3 = 666.

It is not a de Polignac number, because 212121132031233 - 2⁴ = 212121132031217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 212121132031197 and 212121132031206.

It is not an unprimeable number, because it can be changed into a prime (212121132031243) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 68915246035 + ... + 68915249112.

It is an arithmetic number, because the mean of its divisors is an integer number (16677489912908).

Almost surely, 2^{212121132031233} is an apocalyptic number.

It is an amenable number.

212121132031233 is a deficient number, since it is larger than the sum of its proper divisors (121428666226927).

212121132031233 is a wasteful number, since it uses less digits than its factorization.

212121132031233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137830495178 (or 137830495169 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

Adding to 212121132031233 its reverse (332130231121212), we get a palindrome (544251363152445).

The spelling of 212121132031233 in words is "two hundred twelve trillion, one hundred twenty-one billion, one hundred thirty-two million, thirty-one thousand, two hundred thirty-three".