221221120011 has 32 divisors (see below), whose sum is σ = 298754426880. Its totient is φ = 145598010624.

The previous prime is 221221119983. The next prime is 221221120069. The reversal of 221221120011 is 110021122122.

It is not a de Polignac number, because 221221120011 - 2¹⁴ = 221221103627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221221120111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 141174150 + ... + 141175716.

It is an arithmetic number, because the mean of its divisors is an integer number (9336075840).

Almost surely, 2^221221120011 is an apocalyptic number.

221221120011 is a deficient number, since it is larger than the sum of its proper divisors (77533306869).

221221120011 is a wasteful number, since it uses less digits than its factorization.

221221120011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3395.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 221221120011 its reverse (110021122122), we get a palindrome (331242242133).

The spelling of 221221120011 in words is "two hundred twenty-one billion, two hundred twenty-one million, one hundred twenty thousand, eleven".