121100121120 has 192 divisors, whose sum is σ = 429568634880. Its totient is φ = 28410547200.

The previous prime is 121100121113. The next prime is 121100121133. The reversal of 121100121120 is 21121001121.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 121100121096 and 121100121105.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 206250 + ... + 533609.

It is an arithmetic number, because the mean of its divisors is an integer number (2237336640).

Almost surely, 2^121100121120 is an apocalyptic number.

121100121120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121100121120 is an abundant number, since it is smaller than the sum of its proper divisors (308468513760).

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

121100121120 is a wasteful number, since it uses less digits than its factorization.

121100121120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739919 (or 739911 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 121100121120 its reverse (21121001121), we get a palindrome (142221122241).

The spelling of 121100121120 in words is "one hundred twenty-one billion, one hundred million, one hundred twenty-one thousand, one hundred twenty".