121111212107 has 2 divisors, whose sum is σ = 121111212108. Its totient is φ = 121111212106.

The previous prime is 121111212091. The next prime is 121111212121. The reversal of 121111212107 is 701212111121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121111212107 - 2⁴ = 121111212091 is a prime.

It is not a weakly prime, because it can be changed into another prime (121111212197) 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, 60555606053 + 60555606054.

It is an arithmetic number, because the mean of its divisors is an integer number (60555606054).

Almost surely, 2^121111212107 is an apocalyptic number.

121111212107 is a deficient number, since it is larger than the sum of its proper divisors (1).

121111212107 is an equidigital number, since it uses as much as digits as its factorization.

121111212107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56, while the sum is 20.

Adding to 121111212107 its reverse (701212111121), we get a palindrome (822323323228).

The spelling of 121111212107 in words is "one hundred twenty-one billion, one hundred eleven million, two hundred twelve thousand, one hundred seven".