121101100100111 has 2 divisors, whose sum is σ = 121101100100112. Its totient is φ = 121101100100110.

The previous prime is 121101100100107. The next prime is 121101100100179. The reversal of 121101100100111 is 111001001101121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121101100100111 - 2² = 121101100100107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121101100100092 and 121101100100101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121101100100011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60550550050055 + 60550550050056.

It is an arithmetic number, because the mean of its divisors is an integer number (60550550050056).

Almost surely, 2^{121101100100111} is an apocalyptic number.

121101100100111 is a deficient number, since it is larger than the sum of its proper divisors (1).

121101100100111 is an equidigital number, since it uses as much as digits as its factorization.

121101100100111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2, while the sum is 11.

Adding to 121101100100111 its reverse (111001001101121), we get a palindrome (232102101201232).

The spelling of 121101100100111 in words is "one hundred twenty-one trillion, one hundred one billion, one hundred million, one hundred thousand, one hundred eleven".