11112220320121 has 32 divisors (see below), whose sum is σ = 11755634411520. Its totient is φ = 10474850534400.

The previous prime is 11112220320109. The next prime is 11112220320133. The reversal of 11112220320121 is 12102302221111.

It is an interprime number because it is at equal distance from previous prime (11112220320109) and next prime (11112220320133).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11112220320121 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11112220320101) 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, 6135957306 + ... + 6135959116.

It is an arithmetic number, because the mean of its divisors is an integer number (367363575360).

Almost surely, 2^{11112220320121} is an apocalyptic number.

It is an amenable number.

11112220320121 is a deficient number, since it is larger than the sum of its proper divisors (643414091399).

11112220320121 is a wasteful number, since it uses less digits than its factorization.

11112220320121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3925.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 11112220320121 its reverse (12102302221111), we get a palindrome (23214522541232).

The spelling of 11112220320121 in words is "eleven trillion, one hundred twelve billion, two hundred twenty million, three hundred twenty thousand, one hundred twenty-one".