121331153 has 2 divisors, whose sum is σ = 121331154. Its totient is φ = 121331152.

The previous prime is 121331113. The next prime is 121331167. The reversal of 121331153 is 351133121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 106646929 + 14684224 = 10327^2 + 3832^2 .

It is an emirp because it is prime and its reverse (351133121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121331153 - 2¹⁴ = 121314769 is a prime.

It is not a weakly prime, because it can be changed into another prime (121331113) 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 as a sum of consecutive naturals, namely, 60665576 + 60665577.

It is an arithmetic number, because the mean of its divisors is an integer number (60665577).

Almost surely, 2^121331153 is an apocalyptic number.

It is an amenable number.

121331153 is a deficient number, since it is larger than the sum of its proper divisors (1).

121331153 is an equidigital number, since it uses as much as digits as its factorization.

121331153 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 270, while the sum is 20.

The square root of 121331153 is about 11015.0421242953. The cubic root of 121331153 is about 495.0595486636.

Adding to 121331153 its reverse (351133121), we get a palindrome (472464274).

The spelling of 121331153 in words is "one hundred twenty-one million, three hundred thirty-one thousand, one hundred fifty-three".