10122391 has 2 divisors, whose sum is σ = 10122392. Its totient is φ = 10122390.

The previous prime is 10122389. The next prime is 10122419. The reversal of 10122391 is 19322101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10122391 - 2¹ = 10122389 is a prime.

Together with 10122389, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10122331) 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, 5061195 + 5061196.

It is an arithmetic number, because the mean of its divisors is an integer number (5061196).

Almost surely, 2^10122391 is an apocalyptic number.

10122391 is a deficient number, since it is larger than the sum of its proper divisors (1).

10122391 is an equidigital number, since it uses as much as digits as its factorization.

10122391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 10122391 is about 3181.5705241280. The cubic root of 10122391 is about 216.3188520776.

Adding to 10122391 its reverse (19322101), we get a palindrome (29444492).

It can be divided in two parts, 1012 and 2391, that added together give a triangular number (3403 = T₈₂).

The spelling of 10122391 in words is "ten million, one hundred twenty-two thousand, three hundred ninety-one".