11111221101201 has 16 divisors (see below), whose sum is σ = 15994360878720. Its totient is φ = 6820622956800.

The previous prime is 11111221101157. The next prime is 11111221101209. The reversal of 11111221101201 is 10210112211111.

It is not a de Polignac number, because 11111221101201 - 2²² = 11111216906897 is a prime.

It is a super-3 number, since 3×11111221101201³ (a number of 40 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (11111221101209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 355225141 + ... + 355256418.

It is an arithmetic number, because the mean of its divisors is an integer number (999647554920).

Almost surely, 2^{11111221101201} is an apocalyptic number.

It is an amenable number.

11111221101201 is a deficient number, since it is larger than the sum of its proper divisors (4883139777519).

11111221101201 is a wasteful number, since it uses less digits than its factorization.

11111221101201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710481976.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 11111221101201 its reverse (10210112211111), we get a palindrome (21321333312312).

The spelling of 11111221101201 in words is "eleven trillion, one hundred eleven billion, two hundred twenty-one million, one hundred one thousand, two hundred one".