121100120 has 16 divisors (see below), whose sum is σ = 272475360. Its totient is φ = 48440032.

The previous prime is 121100117. The next prime is 121100131. The reversal of 121100120 is 21001121.

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

It is a junction number, because it is equal to n+sod(n) for n = 121100098 and 121100107.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1513712 + ... + 1513791.

It is an arithmetic number, because the mean of its divisors is an integer number (17029710).

Almost surely, 2^121100120 is an apocalyptic number.

121100120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121100120 is an abundant number, since it is smaller than the sum of its proper divisors (151375240).

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

121100120 is a wasteful number, since it uses less digits than its factorization.

121100120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3027514 (or 3027510 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 121100120 is about 11004.5499680814. The cubic root of 121100120 is about 494.7451260754.

Adding to 121100120 its reverse (21001121), we get a palindrome (142101241).

The spelling of 121100120 in words is "one hundred twenty-one million, one hundred thousand, one hundred twenty".