121660573 has 2 divisors, whose sum is σ = 121660574. Its totient is φ = 121660572.

The previous prime is 121660541. The next prime is 121660579. The reversal of 121660573 is 375066121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76003524 + 45657049 = 8718^2 + 6757^2 .

It is a cyclic number.

It is not a de Polignac number, because 121660573 - 2⁵ = 121660541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121660579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60830286 + 60830287.

It is an arithmetic number, because the mean of its divisors is an integer number (60830287).

Almost surely, 2^121660573 is an apocalyptic number.

It is an amenable number.

121660573 is a deficient number, since it is larger than the sum of its proper divisors (1).

121660573 is an equidigital number, since it uses as much as digits as its factorization.

121660573 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 121660573 is about 11029.9851767806. The cubic root of 121660573 is about 495.5071807361.

The spelling of 121660573 in words is "one hundred twenty-one million, six hundred sixty thousand, five hundred seventy-three".