212033321221 has 4 divisors (see below), whose sum is σ = 212036053600. Its totient is φ = 212030588844.

The previous prime is 212033321209. The next prime is 212033321231. The reversal of 212033321221 is 122123330212.

212033321221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212033321221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212033321192 and 212033321201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212033321231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1246281 + ... + 1406158.

It is an arithmetic number, because the mean of its divisors is an integer number (53009013400).

Almost surely, 2^212033321221 is an apocalyptic number.

It is an amenable number.

212033321221 is a deficient number, since it is larger than the sum of its proper divisors (2732379).

212033321221 is an equidigital number, since it uses as much as digits as its factorization.

212033321221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2732378.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 212033321221 its reverse (122123330212), we get a palindrome (334156651433).

The spelling of 212033321221 in words is "two hundred twelve billion, thirty-three million, three hundred twenty-one thousand, two hundred twenty-one".