1212210112111 has 16 divisors (see below), whose sum is σ = 1310993012736. Its totient is φ = 1116486354816.

The previous prime is 1212210112103. The next prime is 1212210112153. The reversal of 1212210112111 is 1112110122121.

It is a cyclic number.

It is not a de Polignac number, because 1212210112111 - 2³ = 1212210112103 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 (1212210119111) 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 15 ways as a sum of consecutive naturals, for example, 6432550 + ... + 6618316.

It is an arithmetic number, because the mean of its divisors is an integer number (81937063296).

Almost surely, 2^{1212210112111} is an apocalyptic number.

1212210112111 is a deficient number, since it is larger than the sum of its proper divisors (98782900625).

1212210112111 is a wasteful number, since it uses less digits than its factorization.

1212210112111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193998.

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

Adding to 1212210112111 its reverse (1112110122121), we get a palindrome (2324320234232).

The spelling of 1212210112111 in words is "one trillion, two hundred twelve billion, two hundred ten million, one hundred twelve thousand, one hundred eleven".