212333221291 has 4 divisors (see below), whose sum is σ = 212351262552. Its totient is φ = 212315180032.

The previous prime is 212333221253. The next prime is 212333221363. The reversal of 212333221291 is 192122333212.

212333221291 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.

It is a cyclic number.

It is not a de Polignac number, because 212333221291 - 2²³ = 212324832683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212333221201) 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, 9002965 + ... + 9026518.

It is an arithmetic number, because the mean of its divisors is an integer number (53087815638).

Almost surely, 2^212333221291 is an apocalyptic number.

212333221291 is a deficient number, since it is larger than the sum of its proper divisors (18041261).

212333221291 is a wasteful number, since it uses less digits than its factorization.

212333221291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18041260.

The product of its digits is 7776, while the sum is 31.

The spelling of 212333221291 in words is "two hundred twelve billion, three hundred thirty-three million, two hundred twenty-one thousand, two hundred ninety-one".