121522240 has 56 divisors (see below), whose sum is σ = 330720192. Its totient is φ = 41664000.

The previous prime is 121522231. The next prime is 121522243. The reversal of 121522240 is 42225121.

It is a tau number, because it is divible by the number of its divisors (56).

It is not an unprimeable number, because it can be changed into a prime (121522243) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 24886 + ... + 29365.

Almost surely, 2^121522240 is an apocalyptic number.

121522240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121522240 is an abundant number, since it is smaller than the sum of its proper divisors (209197952).

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

121522240 is an equidigital number, since it uses as much as digits as its factorization.

121522240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54275 (or 54265 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 121522240 is about 11023.7126232499. The cubic root of 121522240 is about 495.3193055983.

Adding to 121522240 its reverse (42225121), we get a palindrome (163747361).

The spelling of 121522240 in words is "one hundred twenty-one million, five hundred twenty-two thousand, two hundred forty".