221233231211 has 8 divisors (see below), whose sum is σ = 237069204624. Its totient is φ = 205710841600.

The previous prime is 221233231169. The next prime is 221233231223. The reversal of 221233231211 is 112132332122.

221233231211 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221233231211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221233231291) 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 7 ways as a sum of consecutive naturals, for example, 78394490 + ... + 78397311.

It is an arithmetic number, because the mean of its divisors is an integer number (29633650578).

Almost surely, 2^221233231211 is an apocalyptic number.

221233231211 is a deficient number, since it is larger than the sum of its proper divisors (15835973413).

221233231211 is a wasteful number, since it uses less digits than its factorization.

221233231211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156791901.

The product of its digits is 864, while the sum is 23.

Adding to 221233231211 its reverse (112132332122), we get a palindrome (333365563333).

The spelling of 221233231211 in words is "two hundred twenty-one billion, two hundred thirty-three million, two hundred thirty-one thousand, two hundred eleven".