121518472 has 16 divisors (see below), whose sum is σ = 227984400. Its totient is φ = 60722640.

The previous prime is 121518469. The next prime is 121518491. The reversal of 121518472 is 274815121.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13947 + ... + 20917.

It is an arithmetic number, because the mean of its divisors is an integer number (14249025).

Almost surely, 2^121518472 is an apocalyptic number.

It is an amenable number.

121518472 is a deficient number, since it is larger than the sum of its proper divisors (106465928).

121518472 is a wasteful number, since it uses less digits than its factorization.

121518472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9156 (or 9152 counting only the distinct ones).

The product of its digits is 4480, while the sum is 31.

The square root of 121518472 is about 11023.5417176151. The cubic root of 121518472 is about 495.3141861447.

The spelling of 121518472 in words is "one hundred twenty-one million, five hundred eighteen thousand, four hundred seventy-two".