111131022112121 has 12 divisors (see below), whose sum is σ = 122965410833232. Its totient is φ = 99605269449000.

The previous prime is 111131022112027. The next prime is 111131022112129. The reversal of 111131022112121 is 121211220131111.

It is a de Polignac number, because none of the positive numbers 2^k-111131022112121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111131022112093 and 111131022112102.

It is not an unprimeable number, because it can be changed into a prime (111131022112129) 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 11 ways as a sum of consecutive naturals, for example, 1002009635 + ... + 1002120536.

It is an arithmetic number, because the mean of its divisors is an integer number (10247117569436).

Almost surely, 2^{111131022112121} is an apocalyptic number.

111131022112121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111131022112121 is a deficient number, since it is larger than the sum of its proper divisors (11834388721111).

111131022112121 is an equidigital number, since it uses as much as digits as its factorization.

111131022112121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2004130324 (or 2004130253 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 20.

Adding to 111131022112121 its reverse (121211220131111), we get a palindrome (232342242243232).

The spelling of 111131022112121 in words is "one hundred eleven trillion, one hundred thirty-one billion, twenty-two million, one hundred twelve thousand, one hundred twenty-one".