121111222012201 has 2 divisors, whose sum is σ = 121111222012202. Its totient is φ = 121111222012200.

The previous prime is 121111222012189. The next prime is 121111222012219. The reversal of 121111222012201 is 102210222111121.

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., 120246137862400 + 865084149801 = 10965680^2 + 930099^2 .

It is a cyclic number.

It is not a de Polignac number, because 121111222012201 - 2⁷ = 121111222012073 is a prime.

It is not a weakly prime, because it can be changed into another prime (121111222012901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60555611006100 + 60555611006101.

It is an arithmetic number, because the mean of its divisors is an integer number (60555611006101).

Almost surely, 2^{121111222012201} is an apocalyptic number.

It is an amenable number.

121111222012201 is a deficient number, since it is larger than the sum of its proper divisors (1).

121111222012201 is an equidigital number, since it uses as much as digits as its factorization.

121111222012201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 121111222012201 its reverse (102210222111121), we get a palindrome (223321444123322).

The spelling of 121111222012201 in words is "one hundred twenty-one trillion, one hundred eleven billion, two hundred twenty-two million, twelve thousand, two hundred one".