121403144 has 8 divisors (see below), whose sum is σ = 227630910. Its totient is φ = 60701568.

The previous prime is 121403119. The next prime is 121403153. The reversal of 121403144 is 441304121.

It can be written as a sum of positive squares in only one way, i.e., 87647044 + 33756100 = 9362^2 + 5810^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7587689 + ... + 7587704.

Almost surely, 2^121403144 is an apocalyptic number.

It is an amenable number.

121403144 is a deficient number, since it is larger than the sum of its proper divisors (106227766).

121403144 is a wasteful number, since it uses less digits than its factorization.

121403144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15175399 (or 15175395 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 121403144 is about 11018.3094892093. The cubic root of 121403144 is about 495.1574426904.

Adding to 121403144 its reverse (441304121), we get a palindrome (562707265).

The spelling of 121403144 in words is "one hundred twenty-one million, four hundred three thousand, one hundred forty-four".