121346531 has 2 divisors, whose sum is σ = 121346532. Its totient is φ = 121346530.

The previous prime is 121346509. The next prime is 121346543. The reversal of 121346531 is 135643121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121346531 - 2²² = 117152227 is a prime.

It is a super-2 number, since 2×121346531² = 29449961171467922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121346531.

It is not a weakly prime, because it can be changed into another prime (121346501) 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, 60673265 + 60673266.

It is an arithmetic number, because the mean of its divisors is an integer number (60673266).

Almost surely, 2^121346531 is an apocalyptic number.

121346531 is a deficient number, since it is larger than the sum of its proper divisors (1).

121346531 is an equidigital number, since it uses as much as digits as its factorization.

121346531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 26.

The square root of 121346531 is about 11015.7401476251. The cubic root of 121346531 is about 495.0804630618.

Adding to 121346531 its reverse (135643121), we get a palindrome (256989652).

The spelling of 121346531 in words is "one hundred twenty-one million, three hundred forty-six thousand, five hundred thirty-one".