121112144 has 10 divisors (see below), whose sum is σ = 234654810. Its totient is φ = 60556064.

The previous prime is 121112129. The next prime is 121112171. The reversal of 121112144 is 441211121.

It can be written as a sum of positive squares in only one way, i.e., 97219600 + 23892544 = 9860^2 + 4888^2 .

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3784739 + ... + 3784770.

It is an arithmetic number, because the mean of its divisors is an integer number (23465481).

Almost surely, 2^121112144 is an apocalyptic number.

It is an amenable number.

121112144 is a deficient number, since it is larger than the sum of its proper divisors (113542666).

121112144 is an equidigital number, since it uses as much as digits as its factorization.

121112144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7569517 (or 7569511 counting only the distinct ones).

The product of its digits is 64, while the sum is 17.

The square root of 121112144 is about 11005.0962739996. The cubic root of 121112144 is about 494.7614999059.

Adding to 121112144 its reverse (441211121), we get a palindrome (562323265).

The spelling of 121112144 in words is "one hundred twenty-one million, one hundred twelve thousand, one hundred forty-four".