121402751 has 2 divisors, whose sum is σ = 121402752. Its totient is φ = 121402750.

The previous prime is 121402733. The next prime is 121402817. The reversal of 121402751 is 157204121.

It is a weak prime.

It is an emirp because it is prime and its reverse (157204121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121402751 - 2¹⁴ = 121386367 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121402051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60701375 + 60701376.

It is an arithmetic number, because the mean of its divisors is an integer number (60701376).

Almost surely, 2^121402751 is an apocalyptic number.

121402751 is a deficient number, since it is larger than the sum of its proper divisors (1).

121402751 is an equidigital number, since it uses as much as digits as its factorization.

121402751 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 121402751 is about 11018.2916552431. The cubic root of 121402751 is about 495.1569083904.

Adding to 121402751 its reverse (157204121), we get a palindrome (278606872).

The spelling of 121402751 in words is "one hundred twenty-one million, four hundred two thousand, seven hundred fifty-one".