11011201201221 has 32 divisors (see below), whose sum is σ = 15840741396480. Its totient is φ = 6763361630400.

The previous prime is 11011201201139. The next prime is 11011201201303. The reversal of 11011201201221 is 12210210211011.

It is a happy number.

11011201201221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (11011201201139) and next prime (11011201201303).

It is not a de Polignac number, because 11011201201221 - 2¹⁵ = 11011201168453 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11011201201221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11011201200221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 194135056 + ... + 194191766.

It is an arithmetic number, because the mean of its divisors is an integer number (495023168640).

Almost surely, 2^{11011201201221} is an apocalyptic number.

It is an amenable number.

11011201201221 is a deficient number, since it is larger than the sum of its proper divisors (4829540195259).

11011201201221 is a wasteful number, since it uses less digits than its factorization.

11011201201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66017.

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

Adding to 11011201201221 its reverse (12210210211011), we get a palindrome (23221411412232).

The spelling of 11011201201221 in words is "eleven trillion, eleven billion, two hundred one million, two hundred one thousand, two hundred twenty-one".