212420221133 has 4 divisors (see below), whose sum is σ = 212431899900. Its totient is φ = 212408542368.

The previous prime is 212420221121. The next prime is 212420221163. The reversal of 212420221133 is 331122024212.

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 143900352964 + 68519868169 = 379342^2 + 261763^2 .

It is a cyclic number.

It is not a de Polignac number, because 212420221133 - 2²⁶ = 212353112269 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212420221099 and 212420221108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212420221163) 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, 5812058 + ... + 5848491.

It is an arithmetic number, because the mean of its divisors is an integer number (53107974975).

Almost surely, 2^212420221133 is an apocalyptic number.

It is an amenable number.

212420221133 is a deficient number, since it is larger than the sum of its proper divisors (11678767).

212420221133 is a wasteful number, since it uses less digits than its factorization.

212420221133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11678766.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 212420221133 its reverse (331122024212), we get a palindrome (543542245345).

The spelling of 212420221133 in words is "two hundred twelve billion, four hundred twenty million, two hundred twenty-one thousand, one hundred thirty-three".