1212111112101 has 64 divisors (see below), whose sum is σ = 1761854976000. Its totient is φ = 738230630400.

The previous prime is 1212111112061. The next prime is 1212111112127. The reversal of 1212111112101 is 1012111112121.

It is not a de Polignac number, because 1212111112101 - 2¹⁰ = 1212111111077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212111112141) 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 63 ways as a sum of consecutive naturals, for example, 713425350 + ... + 713427048.

It is an arithmetic number, because the mean of its divisors is an integer number (27528984000).

Almost surely, 2^{1212111112101} is an apocalyptic number.

It is an amenable number.

1212111112101 is a deficient number, since it is larger than the sum of its proper divisors (549743863899).

1212111112101 is a wasteful number, since it uses less digits than its factorization.

1212111112101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3290.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 1212111112101 its reverse (1012111112121), we get a palindrome (2224222224222).

The spelling of 1212111112101 in words is "one trillion, two hundred twelve billion, one hundred eleven million, one hundred twelve thousand, one hundred one".