121560602221 has 2 divisors, whose sum is σ = 121560602222. Its totient is φ = 121560602220.

The previous prime is 121560602213. The next prime is 121560602239. The reversal of 121560602221 is 122206065121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61283478025 + 60277124196 = 247555^2 + 245514^2 .

It is a cyclic number.

It is not a de Polignac number, because 121560602221 - 2³ = 121560602213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121560602221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121560602201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60780301110 + 60780301111.

It is an arithmetic number, because the mean of its divisors is an integer number (60780301111).

Almost surely, 2^121560602221 is an apocalyptic number.

It is an amenable number.

121560602221 is a deficient number, since it is larger than the sum of its proper divisors (1).

121560602221 is an equidigital number, since it uses as much as digits as its factorization.

121560602221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 28.

Adding to 121560602221 its reverse (122206065121), we get a palindrome (243766667342).

The spelling of 121560602221 in words is "one hundred twenty-one billion, five hundred sixty million, six hundred two thousand, two hundred twenty-one".