121103920 has 80 divisors (see below), whose sum is σ = 340746048. Its totient is φ = 39075840.

The previous prime is 121103911. The next prime is 121103921. The reversal of 121103920 is 29301121.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (121103921) 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, 3160 + ... + 15880.

Almost surely, 2^121103920 is an apocalyptic number.

121103920 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 121103920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170373024).

121103920 is an abundant number, since it is smaller than the sum of its proper divisors (219642128).

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

121103920 is a wasteful number, since it uses less digits than its factorization.

121103920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12758 (or 12752 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 121103920 is about 11004.7226225835. The cubic root of 121103920 is about 494.7503008895.

The spelling of 121103920 in words is "one hundred twenty-one million, one hundred three thousand, nine hundred twenty".