111220011121121 has 24 divisors (see below), whose sum is σ = 132203280151296. Its totient is φ = 93252148637760.

The previous prime is 111220011120989. The next prime is 111220011121159. The reversal of 111220011121121 is 121121110022111.

It is not a de Polignac number, because 111220011121121 - 2⁴⁶ = 40851266943457 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111220011121121.

It is not an unprimeable number, because it can be changed into a prime (111220011121421) 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 23 ways as a sum of consecutive naturals, for example, 8970956 + ... + 17404541.

It is an arithmetic number, because the mean of its divisors is an integer number (5508470006304).

Almost surely, 2^{111220011121121} is an apocalyptic number.

It is an amenable number.

111220011121121 is a deficient number, since it is larger than the sum of its proper divisors (20983269030175).

111220011121121 is a wasteful number, since it uses less digits than its factorization.

111220011121121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26377389 (or 26377382 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 111220011121121 its reverse (121121110022111), we get a palindrome (232341121143232).

The spelling of 111220011121121 in words is "one hundred eleven trillion, two hundred twenty billion, eleven million, one hundred twenty-one thousand, one hundred twenty-one".