121387072 has 112 divisors (see below), whose sum is σ = 272125440. Its totient is φ = 53452800.

The previous prime is 121387043. The next prime is 121387081. The reversal of 121387072 is 270783121.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1989922 + ... + 1989982.

Almost surely, 2^121387072 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121387072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136062720).

121387072 is an abundant number, since it is smaller than the sum of its proper divisors (150738368).

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

121387072 is a wasteful number, since it uses less digits than its factorization.

121387072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180 (or 170 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 121387072 is about 11017.5801335865. The cubic root of 121387072 is about 495.1355911925.

The spelling of 121387072 in words is "one hundred twenty-one million, three hundred eighty-seven thousand, seventy-two".