121131541 has 2 divisors, whose sum is σ = 121131542. Its totient is φ = 121131540.

The previous prime is 121131533. The next prime is 121131551. The reversal of 121131541 is 145131121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102941316 + 18190225 = 10146^2 + 4265^2 .

It is an emirp because it is prime and its reverse (145131121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121131541 - 2³ = 121131533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121131551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60565770 + 60565771.

It is an arithmetic number, because the mean of its divisors is an integer number (60565771).

Almost surely, 2^121131541 is an apocalyptic number.

It is an amenable number.

121131541 is a deficient number, since it is larger than the sum of its proper divisors (1).

121131541 is an equidigital number, since it uses as much as digits as its factorization.

121131541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120, while the sum is 19.

The square root of 121131541 is about 11005.9775122431. The cubic root of 121131541 is about 494.7879117262.

Adding to 121131541 its reverse (145131121), we get a palindrome (266262662).

The spelling of 121131541 in words is "one hundred twenty-one million, one hundred thirty-one thousand, five hundred forty-one".