121146731 has 2 divisors, whose sum is σ = 121146732. Its totient is φ = 121146730.

The previous prime is 121146713. The next prime is 121146733. The reversal of 121146731 is 137641121.

Together with previous prime (121146713) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121146731 is a prime.

It is a super-2 number, since 2×121146731² = 29353060863972722, which contains 22 as substring.

Together with 121146733, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_6903233 and since 121146731 and 6903233 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121146731.

It is not a weakly prime, because it can be changed into another prime (121146733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60573365 + 60573366.

It is an arithmetic number, because the mean of its divisors is an integer number (60573366).

Almost surely, 2^121146731 is an apocalyptic number.

121146731 is a deficient number, since it is larger than the sum of its proper divisors (1).

121146731 is an equidigital number, since it uses as much as digits as its factorization.

121146731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008, while the sum is 26.

The square root of 121146731 is about 11006.6675701595. The cubic root of 121146731 is about 494.8085931390.

Adding to 121146731 its reverse (137641121), we get a palindrome (258787852).

The spelling of 121146731 in words is "one hundred twenty-one million, one hundred forty-six thousand, seven hundred thirty-one".