121927901 has 2 divisors, whose sum is σ = 121927902. Its totient is φ = 121927900.

The previous prime is 121927879. The next prime is 121927937. The reversal of 121927901 is 109729121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90231001 + 31696900 = 9499^2 + 5630^2 .

It is an emirp because it is prime and its reverse (109729121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121927901 - 2¹⁸ = 121665757 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 (121927951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60963950 + 60963951.

It is an arithmetic number, because the mean of its divisors is an integer number (60963951).

Almost surely, 2^121927901 is an apocalyptic number.

It is an amenable number.

121927901 is a deficient number, since it is larger than the sum of its proper divisors (1).

121927901 is an equidigital number, since it uses as much as digits as its factorization.

121927901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 32.

The square root of 121927901 is about 11042.0967664661. The cubic root of 121927901 is about 495.8698455862.

The spelling of 121927901 in words is "one hundred twenty-one million, nine hundred twenty-seven thousand, nine hundred one".