121443541 has 2 divisors, whose sum is σ = 121443542. Its totient is φ = 121443540.

The previous prime is 121443533. The next prime is 121443557. The reversal of 121443541 is 145344121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117722500 + 3721041 = 10850^2 + 1929^2 .

It is a cyclic number.

It is not a de Polignac number, because 121443541 - 2³ = 121443533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121443521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60721770 + 60721771.

It is an arithmetic number, because the mean of its divisors is an integer number (60721771).

Almost surely, 2^121443541 is an apocalyptic number.

It is an amenable number.

121443541 is a deficient number, since it is larger than the sum of its proper divisors (1).

121443541 is an equidigital number, since it uses as much as digits as its factorization.

121443541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1920, while the sum is 25.

The square root of 121443541 is about 11020.1425126901. The cubic root of 121443541 is about 495.2123579540.

Adding to 121443541 its reverse (145344121), we get a palindrome (266787662).

The spelling of 121443541 in words is "one hundred twenty-one million, four hundred forty-three thousand, five hundred forty-one".