121317541 has 2 divisors, whose sum is σ = 121317542. Its totient is φ = 121317540.

The previous prime is 121317533. The next prime is 121317551. The reversal of 121317541 is 145713121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97022500 + 24295041 = 9850^2 + 4929^2 .

It is an emirp because it is prime and its reverse (145713121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121317541 - 2³ = 121317533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121317551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60658770 + 60658771.

It is an arithmetic number, because the mean of its divisors is an integer number (60658771).

Almost surely, 2^121317541 is an apocalyptic number.

It is an amenable number.

121317541 is a deficient number, since it is larger than the sum of its proper divisors (1).

121317541 is an equidigital number, since it uses as much as digits as its factorization.

121317541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 840, while the sum is 25.

The square root of 121317541 is about 11014.4242246247. The cubic root of 121317541 is about 495.0410345875.

The spelling of 121317541 in words is "one hundred twenty-one million, three hundred seventeen thousand, five hundred forty-one".