121560765229 has 2 divisors, whose sum is σ = 121560765230. Its totient is φ = 121560765228.

The previous prime is 121560765121. The next prime is 121560765257. The reversal of 121560765229 is 922567065121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116092162729 + 5468602500 = 340723^2 + 73950^2 .

It is a cyclic number.

It is not a de Polignac number, because 121560765229 - 2¹³ = 121560757037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121560763229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60780382614 + 60780382615.

It is an arithmetic number, because the mean of its divisors is an integer number (60780382615).

Almost surely, 2^121560765229 is an apocalyptic number.

It is an amenable number.

121560765229 is a deficient number, since it is larger than the sum of its proper divisors (1).

121560765229 is an equidigital number, since it uses as much as digits as its factorization.

121560765229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 453600, while the sum is 46.

The spelling of 121560765229 in words is "one hundred twenty-one billion, five hundred sixty million, seven hundred sixty-five thousand, two hundred twenty-nine".