121120144 has 10 divisors (see below), whose sum is σ = 234670310. Its totient is φ = 60560064.

The previous prime is 121120141. The next prime is 121120147. The reversal of 121120144 is 441021121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (121120141) and next prime (121120147).

It can be written as a sum of positive squares in only one way, i.e., 92390544 + 28729600 = 9612^2 + 5360^2 .

It is a Harshad number since it is a multiple of its sum of digits (16), and also a Moran number because the ratio is a prime number: 7570009 = 121120144 / (1 + 2 + 1 + 1 + 2 + 0 + 1 + 4 + 4).

It is not an unprimeable number, because it can be changed into a prime (121120141) 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 as a sum of consecutive naturals, namely, 3784989 + ... + 3785020.

It is an arithmetic number, because the mean of its divisors is an integer number (23467031).

Almost surely, 2^121120144 is an apocalyptic number.

It is an amenable number.

121120144 is a deficient number, since it is larger than the sum of its proper divisors (113550166).

121120144 is an equidigital number, since it uses as much as digits as its factorization.

121120144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7570017 (or 7570011 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 121120144 is about 11005.4597359674. The cubic root of 121120144 is about 494.7723934044.

Adding to 121120144 its reverse (441021121), we get a palindrome (562141265).

The spelling of 121120144 in words is "one hundred twenty-one million, one hundred twenty thousand, one hundred forty-four".