11101131221 has 8 divisors (see below), whose sum is σ = 11162472000. Its totient is φ = 11039846400.

The previous prime is 11101131211. The next prime is 11101131281. The reversal of 11101131221 is 12213110111.

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

It is a cyclic number.

It is not a de Polignac number, because 11101131221 - 2³⁰ = 10027389397 is a prime.

It is a super-2 number, since 2×11101131221² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11101131196 and 11101131205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11101131211) 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, 420821 + ... + 446421.

It is an arithmetic number, because the mean of its divisors is an integer number (1395309000).

Almost surely, 2^11101131221 is an apocalyptic number.

It is an amenable number.

11101131221 is a deficient number, since it is larger than the sum of its proper divisors (61340779).

11101131221 is a wasteful number, since it uses less digits than its factorization.

11101131221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27979.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 11101131221 its reverse (12213110111), we get a palindrome (23314241332).

The spelling of 11101131221 in words is "eleven billion, one hundred one million, one hundred thirty-one thousand, two hundred twenty-one".