121111223113 has 2 divisors, whose sum is σ = 121111223114. Its totient is φ = 121111223112.

The previous prime is 121111223071. The next prime is 121111223153. The reversal of 121111223113 is 311322111121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112541462784 + 8569760329 = 335472^2 + 92573^2 .

It is a cyclic number.

It is not a de Polignac number, because 121111223113 - 2⁹ = 121111222601 is a prime.

It is not a weakly prime, because it can be changed into another prime (121111223153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60555611556 + 60555611557.

It is an arithmetic number, because the mean of its divisors is an integer number (60555611557).

Almost surely, 2^121111223113 is an apocalyptic number.

It is an amenable number.

121111223113 is a deficient number, since it is larger than the sum of its proper divisors (1).

121111223113 is an equidigital number, since it uses as much as digits as its factorization.

121111223113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72, while the sum is 19.

Adding to 121111223113 its reverse (311322111121), we get a palindrome (432433334234).

The spelling of 121111223113 in words is "one hundred twenty-one billion, one hundred eleven million, two hundred twenty-three thousand, one hundred thirteen".