121146531 has 12 divisors (see below), whose sum is σ = 177548616. Its totient is φ = 73421920.

The previous prime is 121146521. The next prime is 121146541. The reversal of 121146531 is 135641121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (121146521) and next prime (121146541).

It is not a de Polignac number, because 121146531 - 2²⁶ = 54037667 is a prime.

It is a super-2 number, since 2×121146531² = 29352963946667922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121146521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 166506 + ... + 167231.

It is an arithmetic number, because the mean of its divisors is an integer number (14795718).

Almost surely, 2^121146531 is an apocalyptic number.

121146531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121146531 is a deficient number, since it is larger than the sum of its proper divisors (56402085).

121146531 is a wasteful number, since it uses less digits than its factorization.

121146531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333762 (or 333751 counting only the distinct ones).

The product of its digits is 720, while the sum is 24.

The square root of 121146531 is about 11006.6584847537. The cubic root of 121146531 is about 494.8083208473.

Adding to 121146531 its reverse (135641121), we get a palindrome (256787652).

The spelling of 121146531 in words is "one hundred twenty-one million, one hundred forty-six thousand, five hundred thirty-one".