121220222213 has 2 divisors, whose sum is σ = 121220222214. Its totient is φ = 121220222212.

The previous prime is 121220222173. The next prime is 121220222237. The reversal of 121220222213 is 312222022121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 106796932804 + 14423289409 = 326798^2 + 120097^2 .

It is a cyclic number.

It is not a de Polignac number, because 121220222213 - 2⁸ = 121220221957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121220222113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610111106 + 60610111107.

It is an arithmetic number, because the mean of its divisors is an integer number (60610111107).

Almost surely, 2^121220222213 is an apocalyptic number.

It is an amenable number.

121220222213 is a deficient number, since it is larger than the sum of its proper divisors (1).

121220222213 is an equidigital number, since it uses as much as digits as its factorization.

121220222213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 121220222213 its reverse (312222022121), we get a palindrome (433442244334).

The spelling of 121220222213 in words is "one hundred twenty-one billion, two hundred twenty million, two hundred twenty-two thousand, two hundred thirteen".