111121000110021 has 16 divisors (see below), whose sum is σ = 161741938203648. Its totient is φ = 67299647094000.

The previous prime is 111121000110013. The next prime is 111121000110031. The reversal of 111121000110021 is 120011000121111.

It is not a de Polignac number, because 111121000110021 - 2³ = 111121000110013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111121000109979 and 111121000110006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111121000110011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1160290861 + ... + 1160386626.

It is an arithmetic number, because the mean of its divisors is an integer number (10108871137728).

Almost surely, 2^{111121000110021} is an apocalyptic number.

111121000110021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111121000110021 is a deficient number, since it is larger than the sum of its proper divisors (50620938093627).

111121000110021 is a wasteful number, since it uses less digits than its factorization.

111121000110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2320678952.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 111121000110021 its reverse (120011000121111), we get a palindrome (231132000231132).

The spelling of 111121000110021 in words is "one hundred eleven trillion, one hundred twenty-one billion, one hundred ten thousand, twenty-one".