121560622129 has 2 divisors, whose sum is σ = 121560622130. Its totient is φ = 121560622128.

The previous prime is 121560622111. The next prime is 121560622133. The reversal of 121560622129 is 921226065121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103233690000 + 18326932129 = 321300^2 + 135377^2 .

It is a cyclic number.

It is not a de Polignac number, because 121560622129 - 2¹¹ = 121560620081 is a prime.

It is not a weakly prime, because it can be changed into another prime (121560632129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60780311064 + 60780311065.

It is an arithmetic number, because the mean of its divisors is an integer number (60780311065).

Almost surely, 2^121560622129 is an apocalyptic number.

It is an amenable number.

121560622129 is a deficient number, since it is larger than the sum of its proper divisors (1).

121560622129 is an equidigital number, since it uses as much as digits as its factorization.

121560622129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 37.

The spelling of 121560622129 in words is "one hundred twenty-one billion, five hundred sixty million, six hundred twenty-two thousand, one hundred twenty-nine".