121404143 has 16 divisors (see below), whose sum is σ = 146205696. Its totient is φ = 98556480.

The previous prime is 121404131. The next prime is 121404181. The reversal of 121404143 is 341404121.

It is a cyclic number.

It is not a de Polignac number, because 121404143 - 2¹⁰ = 121403119 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121404103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12923 + ... + 20243.

It is an arithmetic number, because the mean of its divisors is an integer number (9137856).

Almost surely, 2^121404143 is an apocalyptic number.

121404143 is a deficient number, since it is larger than the sum of its proper divisors (24801553).

121404143 is a wasteful number, since it uses less digits than its factorization.

121404143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7454.

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

The square root of 121404143 is about 11018.3548227492. The cubic root of 121404143 is about 495.1588008675.

Adding to 121404143 its reverse (341404121), we get a palindrome (462808264).

The spelling of 121404143 in words is "one hundred twenty-one million, four hundred four thousand, one hundred forty-three".