121932431 has 2 divisors, whose sum is σ = 121932432. Its totient is φ = 121932430.

The previous prime is 121932413. The next prime is 121932451. The reversal of 121932431 is 134239121.

Together with previous prime (121932413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is an emirp because it is prime and its reverse (134239121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121932431 - 2¹⁸ = 121670287 is a prime.

It is a super-2 number, since 2×121932431² = 29735035459139522, 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 121932431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121932451) 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 as a sum of consecutive naturals, namely, 60966215 + 60966216.

It is an arithmetic number, because the mean of its divisors is an integer number (60966216).

Almost surely, 2^121932431 is an apocalyptic number.

121932431 is a deficient number, since it is larger than the sum of its proper divisors (1).

121932431 is an equidigital number, since it uses as much as digits as its factorization.

121932431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 26.

The square root of 121932431 is about 11042.3018886462. The cubic root of 121932431 is about 495.8759865449.

The spelling of 121932431 in words is "one hundred twenty-one million, nine hundred thirty-two thousand, four hundred thirty-one".