121221110227201 has 2 divisors, whose sum is σ = 121221110227202. Its totient is φ = 121221110227200.

The previous prime is 121221110227199. The next prime is 121221110227291. The reversal of 121221110227201 is 102722011122121.

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., 102272283576576 + 18948826650625 = 10112976^2 + 4353025^2 .

It is a cyclic number.

It is not a de Polignac number, because 121221110227201 - 2¹ = 121221110227199 is a prime.

Together with 121221110227199, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (121221110227291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610555113600 + 60610555113601.

It is an arithmetic number, because the mean of its divisors is an integer number (60610555113601).

Almost surely, 2^{121221110227201} is an apocalyptic number.

It is an amenable number.

121221110227201 is a deficient number, since it is larger than the sum of its proper divisors (1).

121221110227201 is an equidigital number, since it uses as much as digits as its factorization.

121221110227201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 25.

Adding to 121221110227201 its reverse (102722011122121), we get a palindrome (223943121349322).

The spelling of 121221110227201 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, one hundred ten million, two hundred twenty-seven thousand, two hundred one".