121400305111 has 2 divisors, whose sum is σ = 121400305112. Its totient is φ = 121400305110.

The previous prime is 121400305057. The next prime is 121400305129. The reversal of 121400305111 is 111503004121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121400305111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121400305141) 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, 60700152555 + 60700152556.

It is an arithmetic number, because the mean of its divisors is an integer number (60700152556).

Almost surely, 2^121400305111 is an apocalyptic number.

121400305111 is a deficient number, since it is larger than the sum of its proper divisors (1).

121400305111 is an equidigital number, since it uses as much as digits as its factorization.

121400305111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 19.

Adding to 121400305111 its reverse (111503004121), we get a palindrome (232903309232).

The spelling of 121400305111 in words is "one hundred twenty-one billion, four hundred million, three hundred five thousand, one hundred eleven".