221233242011 has 4 divisors (see below), whose sum is σ = 221371428024. Its totient is φ = 221095056000.

The previous prime is 221233241969. The next prime is 221233242149. The reversal of 221233242011 is 110242332122.

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 221233242011 - 2¹⁸ = 221232979867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221233242311) 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, 69090605 + ... + 69093806.

It is an arithmetic number, because the mean of its divisors is an integer number (55342857006).

Almost surely, 2^221233242011 is an apocalyptic number.

221233242011 is a deficient number, since it is larger than the sum of its proper divisors (138186013).

221233242011 is a wasteful number, since it uses less digits than its factorization.

221233242011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138186012.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 221233242011 its reverse (110242332122), we get a palindrome (331475574133).

The spelling of 221233242011 in words is "two hundred twenty-one billion, two hundred thirty-three million, two hundred forty-two thousand, eleven".