212112142133 has 4 divisors (see below), whose sum is σ = 212370501228. Its totient is φ = 211853783040.

The previous prime is 212112142129. The next prime is 212112142157. The reversal of 212112142133 is 331241211212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 133939896484 + 78172245649 = 365978^2 + 279593^2 .

It is a cyclic number.

It is not a de Polignac number, because 212112142133 - 2² = 212112142129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212112142099 and 212112142108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212112142933) 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, 129178316 + ... + 129179957.

It is an arithmetic number, because the mean of its divisors is an integer number (53092625307).

Almost surely, 2^212112142133 is an apocalyptic number.

It is an amenable number.

212112142133 is a deficient number, since it is larger than the sum of its proper divisors (258359095).

212112142133 is an equidigital number, since it uses as much as digits as its factorization.

212112142133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258359094.

The product of its digits is 576, while the sum is 23.

Adding to 212112142133 its reverse (331241211212), we get a palindrome (543353353345).

The spelling of 212112142133 in words is "two hundred twelve billion, one hundred twelve million, one hundred forty-two thousand, one hundred thirty-three".