212121122033 has 4 divisors (see below), whose sum is σ = 212909676660. Its totient is φ = 211332567408.

The previous prime is 212121121991. The next prime is 212121122053. The reversal of 212121122033 is 330221121212.

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 10549754944 + 201571367089 = 102712^2 + 448967^2 .

It is a cyclic number.

It is not a de Polignac number, because 212121122033 - 2¹⁸ = 212120859889 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212121121996 and 212121122014.

It is not an unprimeable number, because it can be changed into a prime (212121122053) 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, 394276910 + ... + 394277447.

It is an arithmetic number, because the mean of its divisors is an integer number (53227419165).

Almost surely, 2^212121122033 is an apocalyptic number.

It is an amenable number.

212121122033 is a deficient number, since it is larger than the sum of its proper divisors (788554627).

212121122033 is an equidigital number, since it uses as much as digits as its factorization.

212121122033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788554626.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 212121122033 its reverse (330221121212), we get a palindrome (542342243245).

The spelling of 212121122033 in words is "two hundred twelve billion, one hundred twenty-one million, one hundred twenty-two thousand, thirty-three".