11001221220111 has 8 divisors (see below), whose sum is σ = 14672646292224. Its totient is φ = 7331971814040.

The previous prime is 11001221220071. The next prime is 11001221220127. The reversal of 11001221220111 is 11102212210011.

It is a happy number.

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

It is not a de Polignac number, because 11001221220111 - 2¹⁸ = 11001220957967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11001221220161) 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, 543904711 + ... + 543924936.

It is an arithmetic number, because the mean of its divisors is an integer number (1834080786528).

Almost surely, 2^{11001221220111} is an apocalyptic number.

11001221220111 is a deficient number, since it is larger than the sum of its proper divisors (3671425072113).

11001221220111 is a wasteful number, since it uses less digits than its factorization.

11001221220111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1087833021.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 11001221220111 its reverse (11102212210011), we get a palindrome (22103433430122).

The spelling of 11001221220111 in words is "eleven trillion, one billion, two hundred twenty-one million, two hundred twenty thousand, one hundred eleven".