121109440 has 28 divisors (see below), whose sum is σ = 288392616. Its totient is φ = 48443648.

The previous prime is 121109419. The next prime is 121109441. The reversal of 121109440 is 44901121.

It is a super-2 number, since 2×121109440² = 29334992914227200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121109441) by changing a digit.

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, 188914 + ... + 189553.

Almost surely, 2^121109440 is an apocalyptic number.

121109440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121109440 is an abundant number, since it is smaller than the sum of its proper divisors (167283176).

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

121109440 is an equidigital number, since it uses as much as digits as its factorization.

121109440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378484 (or 378474 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 121109440 is about 11004.9734211401. The cubic root of 121109440 is about 494.7578177950.

It can be divided in two parts, 121 and 109440, that added together give a square (109561 = 331²).

The spelling of 121109440 in words is "one hundred twenty-one million, one hundred nine thousand, four hundred forty".