121015729 has 2 divisors, whose sum is σ = 121015730. Its totient is φ = 121015728.

The previous prime is 121015709. The next prime is 121015751. The reversal of 121015729 is 927510121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118919025 + 2096704 = 10905^2 + 1448^2 .

It is a cyclic number.

It is not a de Polignac number, because 121015729 - 2⁹ = 121015217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121015697 and 121015706.

It is not a weakly prime, because it can be changed into another prime (121015709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60507864 + 60507865.

It is an arithmetic number, because the mean of its divisors is an integer number (60507865).

Almost surely, 2^121015729 is an apocalyptic number.

It is an amenable number.

121015729 is a deficient number, since it is larger than the sum of its proper divisors (1).

121015729 is an equidigital number, since it uses as much as digits as its factorization.

121015729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1260, while the sum is 28.

The square root of 121015729 is about 11000.7149313124. The cubic root of 121015729 is about 494.6301750793.

The spelling of 121015729 in words is "one hundred twenty-one million, fifteen thousand, seven hundred twenty-nine".