121012200211111 has 24 divisors (see below), whose sum is σ = 136722417395760. Its totient is φ = 106980228875520.

The previous prime is 121012200211099. The next prime is 121012200211121. The reversal of 121012200211111 is 111112002210121.

It is not a de Polignac number, because 121012200211111 - 2¹¹ = 121012200209063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121012200211121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 82770141 + ... + 84219478.

It is an arithmetic number, because the mean of its divisors is an integer number (5696767391490).

Almost surely, 2^{121012200211111} is an apocalyptic number.

121012200211111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121012200211111 is a deficient number, since it is larger than the sum of its proper divisors (15710217184649).

121012200211111 is a wasteful number, since it uses less digits than its factorization.

121012200211111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166989807 (or 166989796 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 121012200211111 its reverse (111112002210121), we get a palindrome (232124202421232).

The spelling of 121012200211111 in words is "one hundred twenty-one trillion, twelve billion, two hundred million, two hundred eleven thousand, one hundred eleven".