212121111033 has 12 divisors (see below), whose sum is σ = 329966172900. Its totient is φ = 130536068256.

The previous prime is 212121110959. The next prime is 212121111049. The reversal of 212121111033 is 330111121212.

It can be written as a sum of positive squares in 2 ways, for example, as 59796388089 + 152324722944 = 244533^2 + 390288^2 .

It is not a de Polignac number, because 212121111033 - 2⁹ = 212121110521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212121110997 and 212121111015.

It is not an unprimeable number, because it can be changed into a prime (212121111053) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 906500358 + ... + 906500591.

It is an arithmetic number, because the mean of its divisors is an integer number (27497181075).

Almost surely, 2^212121111033 is an apocalyptic number.

It is an amenable number.

212121111033 is a deficient number, since it is larger than the sum of its proper divisors (117845061867).

212121111033 is a wasteful number, since it uses less digits than its factorization.

212121111033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1813000968 (or 1813000965 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 212121111033 its reverse (330111121212), we get a palindrome (542232232245).

The spelling of 212121111033 in words is "two hundred twelve billion, one hundred twenty-one million, one hundred eleven thousand, thirty-three".