121531153 has 2 divisors, whose sum is σ = 121531154. Its totient is φ = 121531152.

The previous prime is 121531127. The next prime is 121531159. The reversal of 121531153 is 351135121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88491649 + 33039504 = 9407^2 + 5748^2 .

It is an emirp because it is prime and its reverse (351135121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121531153 is a prime.

It is a super-2 number, since 2×121531153² = 29539642299018818, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121531159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60765576 + 60765577.

It is an arithmetic number, because the mean of its divisors is an integer number (60765577).

Almost surely, 2^121531153 is an apocalyptic number.

It is an amenable number.

121531153 is a deficient number, since it is larger than the sum of its proper divisors (1).

121531153 is an equidigital number, since it uses as much as digits as its factorization.

121531153 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 450, while the sum is 22.

The square root of 121531153 is about 11024.1168807302. The cubic root of 121531153 is about 495.3314149676.

Adding to 121531153 its reverse (351135121), we get a palindrome (472666274).

The spelling of 121531153 in words is "one hundred twenty-one million, five hundred thirty-one thousand, one hundred fifty-three".