111121000100000 has 288 divisors, whose sum is σ = 298364157346752. Its totient is φ = 40399340800000.

The previous prime is 111121000099997. The next prime is 111121000100069. The reversal of 111121000100000 is 1000121111.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8598693539 + ... + 8598706461.

It is an arithmetic number, because the mean of its divisors is an integer number (1035986657454).

Almost surely, 2^{111121000100000} is an apocalyptic number.

111121000100000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111121000100000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149182078673376).

111121000100000 is an abundant number, since it is smaller than the sum of its proper divisors (187243157246752).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111121000100000 is an equidigital number, since it uses as much as digits as its factorization.

111121000100000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20786 (or 20758 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 111121000100000 its reverse (1000121111), we get a palindrome (111122000221111).

The spelling of 111121000100000 in words is "one hundred eleven trillion, one hundred twenty-one billion, one hundred thousand".