212021110033 has 4 divisors (see below), whose sum is σ = 212022575028. Its totient is φ = 212019645040.

The previous prime is 212021110019. The next prime is 212021110039. The reversal of 212021110033 is 330011120212.

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 37470119184 + 174550990849 = 193572^2 + 417793^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212021110033 is a prime.

It is a super-2 number, since 2×212021110033² (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 = 212021109989 and 212021110016.

It is not an unprimeable number, because it can be changed into a prime (212021110039) 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, 488266 + ... + 813907.

It is an arithmetic number, because the mean of its divisors is an integer number (53005643757).

Almost surely, 2^212021110033 is an apocalyptic number.

It is an amenable number.

212021110033 is a deficient number, since it is larger than the sum of its proper divisors (1464995).

212021110033 is a wasteful number, since it uses less digits than its factorization.

212021110033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1464994.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 212021110033 its reverse (330011120212), we get a palindrome (542032230245).

The spelling of 212021110033 in words is "two hundred twelve billion, twenty-one million, one hundred ten thousand, thirty-three".