121100104000 has 112 divisors (see below), whose sum is σ = 300085231680. Its totient is φ = 48410841600.

The previous prime is 121100103991. The next prime is 121100104001. The reversal of 121100104000 is 401001121.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121100104001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17428527 + ... + 17435473.

Almost surely, 2^121100104000 is an apocalyptic number.

121100104000 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 121100104000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (150042615840).

121100104000 is an abundant number, since it is smaller than the sum of its proper divisors (178985127680).

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

121100104000 is an equidigital number, since it uses as much as digits as its factorization.

121100104000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9153 (or 9133 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 121100104000 its reverse (401001121), we get a palindrome (121501105121).

The spelling of 121100104000 in words is "one hundred twenty-one billion, one hundred million, one hundred four thousand".