11131023201221 has 32 divisors (see below), whose sum is σ = 14356800910080. Its totient is φ = 8374074508800.

The previous prime is 11131023201217. The next prime is 11131023201223. The reversal of 11131023201221 is 12210232013111.

It is not a de Polignac number, because 11131023201221 - 2² = 11131023201217 is a prime.

It is a super-2 number, since 2×11131023201221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11131023201193 and 11131023201202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11131023201223) 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 31 ways as a sum of consecutive naturals, for example, 58545905 + ... + 58735721.

It is an arithmetic number, because the mean of its divisors is an integer number (448650028440).

Almost surely, 2^{11131023201221} is an apocalyptic number.

11131023201221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11131023201221 is a deficient number, since it is larger than the sum of its proper divisors (3225777708859).

11131023201221 is a wasteful number, since it uses less digits than its factorization.

11131023201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216125.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 11131023201221 its reverse (12210232013111), we get a palindrome (23341255214332).

The spelling of 11131023201221 in words is "eleven trillion, one hundred thirty-one billion, twenty-three million, two hundred one thousand, two hundred twenty-one".