221233023211 has 4 divisors (see below), whose sum is σ = 221251454424. Its totient is φ = 221214592000.

The previous prime is 221233023169. The next prime is 221233023223. The reversal of 221233023211 is 112320332122.

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 221233023211 - 2²⁷ = 221098805483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221233023241) 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, 9197590 + ... + 9221611.

It is an arithmetic number, because the mean of its divisors is an integer number (55312863606).

Almost surely, 2^221233023211 is an apocalyptic number.

221233023211 is a deficient number, since it is larger than the sum of its proper divisors (18431213).

221233023211 is a wasteful number, since it uses less digits than its factorization.

221233023211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18431212.

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

Adding to 221233023211 its reverse (112320332122), we get a palindrome (333553355333).

The spelling of 221233023211 in words is "two hundred twenty-one billion, two hundred thirty-three million, twenty-three thousand, two hundred eleven".