121402817 has 2 divisors, whose sum is σ = 121402818. Its totient is φ = 121402816.

The previous prime is 121402751. The next prime is 121402823. The reversal of 121402817 is 718204121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89038096 + 32364721 = 9436^2 + 5689^2 .

It is a cyclic number.

It is not a de Polignac number, because 121402817 - 2¹⁰ = 121401793 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (121401817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60701408 + 60701409.

It is an arithmetic number, because the mean of its divisors is an integer number (60701409).

Almost surely, 2^121402817 is an apocalyptic number.

It is an amenable number.

121402817 is a deficient number, since it is larger than the sum of its proper divisors (1).

121402817 is an equidigital number, since it uses as much as digits as its factorization.

121402817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 896, while the sum is 26.

The square root of 121402817 is about 11018.2946502624. The cubic root of 121402817 is about 495.1569981202.

Adding to 121402817 its reverse (718204121), we get a palindrome (839606938).

The spelling of 121402817 in words is "one hundred twenty-one million, four hundred two thousand, eight hundred seventeen".