11110021201221 has 16 divisors (see below), whose sum is σ = 15744400688640. Its totient is φ = 6948730681200.

The previous prime is 11110021201217. The next prime is 11110021201241. The reversal of 11110021201221 is 12210212001111.

It is a happy number.

It is not a de Polignac number, because 11110021201221 - 2² = 11110021201217 is a prime.

It is a super-2 number, since 2×11110021201221² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11110021201221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11110021201241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 946172055 + ... + 946183796.

It is an arithmetic number, because the mean of its divisors is an integer number (984025043040).

Almost surely, 2^{11110021201221} is an apocalyptic number.

It is an amenable number.

11110021201221 is a deficient number, since it is larger than the sum of its proper divisors (4634379487419).

11110021201221 is a wasteful number, since it uses less digits than its factorization.

11110021201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1892355976.

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

Adding to 11110021201221 its reverse (12210212001111), we get a palindrome (23320233202332).

The spelling of 11110021201221 in words is "eleven trillion, one hundred ten billion, twenty-one million, two hundred one thousand, two hundred twenty-one".