121100440 has 32 divisors (see below), whose sum is σ = 276320160. Its totient is φ = 47756800.

The previous prime is 121100437. The next prime is 121100449. The reversal of 121100440 is 44001121.

It is a self number, because there is not a number n which added to its sum of digits gives 121100440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121100449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18481 + ... + 24160.

It is an arithmetic number, because the mean of its divisors is an integer number (8635005).

Almost surely, 2^121100440 is an apocalyptic number.

121100440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121100440 is an abundant number, since it is smaller than the sum of its proper divisors (155219720).

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

121100440 is a wasteful number, since it uses less digits than its factorization.

121100440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42723 (or 42719 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 121100440 is about 11004.5645075123. The cubic root of 121100440 is about 494.7455618534.

Adding to 121100440 its reverse (44001121), we get a palindrome (165101561).

The spelling of 121100440 in words is "one hundred twenty-one million, one hundred thousand, four hundred forty".