121200100100111 has 2 divisors, whose sum is σ = 121200100100112. Its totient is φ = 121200100100110.

The previous prime is 121200100100047. The next prime is 121200100100147. The reversal of 121200100100111 is 111001001002121.

It is a strong prime.

It is an emirp because it is prime and its reverse (111001001002121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121200100100111 - 2⁶ = 121200100100047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121200100100092 and 121200100100101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121200100100161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60600050050055 + 60600050050056.

It is an arithmetic number, because the mean of its divisors is an integer number (60600050050056).

Almost surely, 2^{121200100100111} is an apocalyptic number.

121200100100111 is a deficient number, since it is larger than the sum of its proper divisors (1).

121200100100111 is an equidigital number, since it uses as much as digits as its factorization.

121200100100111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 121200100100111 its reverse (111001001002121), we get a palindrome (232201101102232).

The spelling of 121200100100111 in words is "one hundred twenty-one trillion, two hundred billion, one hundred million, one hundred thousand, one hundred eleven".