121432501 has 4 divisors (see below), whose sum is σ = 121454572. Its totient is φ = 121410432.

The previous prime is 121432469. The next prime is 121432543. The reversal of 121432501 is 105234121.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 105234121 = 4079 ⋅25799.

It can be written as a sum of positive squares in 2 ways, for example, as 89283601 + 32148900 = 9449^2 + 5670^2 .

It is a cyclic number.

It is not a de Polignac number, because 121432501 - 2⁵ = 121432469 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121436501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4645 + ... + 16261.

It is an arithmetic number, because the mean of its divisors is an integer number (30363643).

Almost surely, 2^121432501 is an apocalyptic number.

It is an amenable number.

121432501 is a deficient number, since it is larger than the sum of its proper divisors (22071).

121432501 is a wasteful number, since it uses less digits than its factorization.

121432501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22070.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 121432501 is about 11019.6416003425. The cubic root of 121432501 is about 495.1973515017.

Adding to 121432501 its reverse (105234121), we get a palindrome (226666622).

The spelling of 121432501 in words is "one hundred twenty-one million, four hundred thirty-two thousand, five hundred one".