11121003131221 has 16 divisors (see below), whose sum is σ = 11587456124928. Its totient is φ = 10661289433200.

The previous prime is 11121003131153. The next prime is 11121003131281. The reversal of 11121003131221 is 12213130012111.

It is a cyclic number.

It is not a de Polignac number, because 11121003131221 - 2¹⁵ = 11121003098453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121003131281) 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, 136629666 + ... + 136711036.

It is an arithmetic number, because the mean of its divisors is an integer number (724216007808).

Almost surely, 2^{11121003131221} is an apocalyptic number.

It is an amenable number.

11121003131221 is a deficient number, since it is larger than the sum of its proper divisors (466452993707).

11121003131221 is a wasteful number, since it uses less digits than its factorization.

11121003131221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122712.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 11121003131221 its reverse (12213130012111), we get a palindrome (23334133143332).

The spelling of 11121003131221 in words is "eleven trillion, one hundred twenty-one billion, three million, one hundred thirty-one thousand, two hundred twenty-one".