212221031333 has 4 divisors (see below), whose sum is σ = 212222270988. Its totient is φ = 212219791680.

The previous prime is 212221031291. The next prime is 212221031357. The reversal of 212221031333 is 333130122212.

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 13912910209 + 198308121124 = 117953^2 + 445318^2 .

It is a cyclic number.

It is not a de Polignac number, because 212221031333 - 2¹² = 212221027237 is a prime.

It is a super-2 number, since 2×212221031333² (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 = 212221031299 and 212221031308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212221033333) 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, 312116 + ... + 722397.

It is an arithmetic number, because the mean of its divisors is an integer number (53055567747).

Almost surely, 2^212221031333 is an apocalyptic number.

It is an amenable number.

212221031333 is a deficient number, since it is larger than the sum of its proper divisors (1239655).

212221031333 is a wasteful number, since it uses less digits than its factorization.

212221031333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1239654.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 212221031333 its reverse (333130122212), we get a palindrome (545351153545).

The spelling of 212221031333 in words is "two hundred twelve billion, two hundred twenty-one million, thirty-one thousand, three hundred thirty-three".