121220111228201 has 2 divisors, whose sum is σ = 121220111228202. Its totient is φ = 121220111228200.

The previous prime is 121220111228197. The next prime is 121220111228239. The reversal of 121220111228201 is 102822111022121.

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., 100347100675600 + 20873010552601 = 10017340^2 + 4568699^2 .

It is a cyclic number.

It is not a de Polignac number, because 121220111228201 - 2² = 121220111228197 is a prime.

It is not a weakly prime, because it can be changed into another prime (121220111228501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610055614100 + 60610055614101.

It is an arithmetic number, because the mean of its divisors is an integer number (60610055614101).

Almost surely, 2^{121220111228201} is an apocalyptic number.

It is an amenable number.

121220111228201 is a deficient number, since it is larger than the sum of its proper divisors (1).

121220111228201 is an equidigital number, since it uses as much as digits as its factorization.

121220111228201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 512, while the sum is 26.

The spelling of 121220111228201 in words is "one hundred twenty-one trillion, two hundred twenty billion, one hundred eleven million, two hundred twenty-eight thousand, two hundred one".