121151440 has 40 divisors (see below), whose sum is σ = 282981888. Its totient is φ = 48236160.

The previous prime is 121151341. The next prime is 121151461. The reversal of 121151440 is 44151121.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14445 + ... + 21235.

Almost surely, 2^121151440 is an apocalyptic number.

121151440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121151440 is an abundant number, since it is smaller than the sum of its proper divisors (161830448).

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

121151440 is a wasteful number, since it uses less digits than its factorization.

121151440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7027 (or 7021 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 121151440 is about 11006.8814838718. The cubic root of 121151440 is about 494.8150041622.

The spelling of 121151440 in words is "one hundred twenty-one million, one hundred fifty-one thousand, four hundred forty".