121220332361 has 2 divisors, whose sum is σ = 121220332362. Its totient is φ = 121220332360.

The previous prime is 121220332349. The next prime is 121220332477. The reversal of 121220332361 is 163233022121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62365572361 + 58854760000 = 249731^2 + 242600^2 .

It is a cyclic number.

It is not a de Polignac number, because 121220332361 - 2¹⁴ = 121220315977 is a prime.

It is a super-2 number, since 2×121220332361² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 121220332361.

It is not a weakly prime, because it can be changed into another prime (121220332561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610166180 + 60610166181.

It is an arithmetic number, because the mean of its divisors is an integer number (60610166181).

Almost surely, 2^121220332361 is an apocalyptic number.

It is an amenable number.

121220332361 is a deficient number, since it is larger than the sum of its proper divisors (1).

121220332361 is an equidigital number, since it uses as much as digits as its factorization.

121220332361 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 121220332361 its reverse (163233022121), we get a palindrome (284453354482).

The spelling of 121220332361 in words is "one hundred twenty-one billion, two hundred twenty million, three hundred thirty-two thousand, three hundred sixty-one".