121201212111223 has 2 divisors, whose sum is σ = 121201212111224. Its totient is φ = 121201212111222.

The previous prime is 121201212111191. The next prime is 121201212111229. The reversal of 121201212111223 is 322111212102121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121201212111223 - 2⁵ = 121201212111191 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121201212111194 and 121201212111203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121201212111229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60600606055611 + 60600606055612.

It is an arithmetic number, because the mean of its divisors is an integer number (60600606055612).

Almost surely, 2^{121201212111223} is an apocalyptic number.

121201212111223 is a deficient number, since it is larger than the sum of its proper divisors (1).

121201212111223 is an equidigital number, since it uses as much as digits as its factorization.

121201212111223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 22.

Adding to 121201212111223 its reverse (322111212102121), we get a palindrome (443312424213344).

The spelling of 121201212111223 in words is "one hundred twenty-one trillion, two hundred one billion, two hundred twelve million, one hundred eleven thousand, two hundred twenty-three".