121541501 has 2 divisors, whose sum is σ = 121541502. Its totient is φ = 121541500.

The previous prime is 121541491. The next prime is 121541509. The reversal of 121541501 is 105145121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61246276 + 60295225 = 7826^2 + 7765^2 .

It is a cyclic number.

It is not a de Polignac number, because 121541501 - 2¹⁰ = 121540477 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121541509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60770750 + 60770751.

It is an arithmetic number, because the mean of its divisors is an integer number (60770751).

Almost surely, 2^121541501 is an apocalyptic number.

It is an amenable number.

121541501 is a deficient number, since it is larger than the sum of its proper divisors (1).

121541501 is an equidigital number, since it uses as much as digits as its factorization.

121541501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 200, while the sum is 20.

The square root of 121541501 is about 11024.5862053866. The cubic root of 121541501 is about 495.3454732122.

Adding to 121541501 its reverse (105145121), we get a palindrome (226686622).

The spelling of 121541501 in words is "one hundred twenty-one million, five hundred forty-one thousand, five hundred one".