121502441 has 4 divisors (see below), whose sum is σ = 123166932. Its totient is φ = 119837952.

The previous prime is 121502419. The next prime is 121502443. The reversal of 121502441 is 144205121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 71149225 + 50353216 = 8435^2 + 7096^2 .

It is a cyclic number.

It is not a de Polignac number, because 121502441 - 2⁶ = 121502377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121502443) 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 3 ways as a sum of consecutive naturals, for example, 832136 + ... + 832281.

It is an arithmetic number, because the mean of its divisors is an integer number (30791733).

Almost surely, 2^121502441 is an apocalyptic number.

It is an amenable number.

121502441 is a deficient number, since it is larger than the sum of its proper divisors (1664491).

121502441 is an equidigital number, since it uses as much as digits as its factorization.

121502441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1664490.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 121502441 is about 11022.8145679767. The cubic root of 121502441 is about 495.2924041862.

Adding to 121502441 its reverse (144205121), we get a palindrome (265707562).

The spelling of 121502441 in words is "one hundred twenty-one million, five hundred two thousand, four hundred forty-one".