121414440 has 64 divisors (see below), whose sum is σ = 416280960. Its totient is φ = 27751680.

The previous prime is 121414439. The next prime is 121414451. The reversal of 121414440 is 44414121.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71431 + ... + 73110.

It is an arithmetic number, because the mean of its divisors is an integer number (6504390).

Almost surely, 2^121414440 is an apocalyptic number.

121414440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121414440 is an abundant number, since it is smaller than the sum of its proper divisors (294866520).

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

121414440 is a wasteful number, since it uses less digits than its factorization.

121414440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144562 (or 144558 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 121414440 is about 11018.8220786071. The cubic root of 121414440 is about 495.1727995826.

Adding to 121414440 its reverse (44414121), we get a palindrome (165828561).

The spelling of 121414440 in words is "one hundred twenty-one million, four hundred fourteen thousand, four hundred forty".