121660255741 has 2 divisors, whose sum is σ = 121660255742. Its totient is φ = 121660255740.

The previous prime is 121660255709. The next prime is 121660255789. The reversal of 121660255741 is 147552066121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79719263716 + 41940992025 = 282346^2 + 204795^2 .

It is a cyclic number.

It is not a de Polignac number, because 121660255741 - 2⁵ = 121660255709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121660255694 and 121660255703.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121660255841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60830127870 + 60830127871.

It is an arithmetic number, because the mean of its divisors is an integer number (60830127871).

Almost surely, 2^121660255741 is an apocalyptic number.

It is an amenable number.

121660255741 is a deficient number, since it is larger than the sum of its proper divisors (1).

121660255741 is an equidigital number, since it uses as much as digits as its factorization.

121660255741 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100800, while the sum is 40.

The spelling of 121660255741 in words is "one hundred twenty-one billion, six hundred sixty million, two hundred fifty-five thousand, seven hundred forty-one".