213112131233 has 4 divisors (see below), whose sum is σ = 213113058708. Its totient is φ = 213111203760.

The previous prime is 213112131217. The next prime is 213112131263. The reversal of 213112131233 is 332131211312.

213112131233 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 118523898529 + 94588232704 = 344273^2 + 307552^2 .

It is a cyclic number.

It is not a de Polignac number, because 213112131233 - 2⁴ = 213112131217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213112131199 and 213112131208.

It is not an unprimeable number, because it can be changed into a prime (213112131263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165803 + ... + 673583.

It is an arithmetic number, because the mean of its divisors is an integer number (53278264677).

Almost surely, 2^213112131233 is an apocalyptic number.

It is an amenable number.

213112131233 is a deficient number, since it is larger than the sum of its proper divisors (927475).

213112131233 is an equidigital number, since it uses as much as digits as its factorization.

213112131233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 927474.

The product of its digits is 648, while the sum is 23.

Adding to 213112131233 its reverse (332131211312), we get a palindrome (545243342545).

The spelling of 213112131233 in words is "two hundred thirteen billion, one hundred twelve million, one hundred thirty-one thousand, two hundred thirty-three".