101111111211212 has 12 divisors (see below), whose sum is σ = 177004001841576. Its totient is φ = 50538539256480.

The previous prime is 101111111211203. The next prime is 101111111211217. The reversal of 101111111211212 is 212112111111101.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (101111111211217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4254073913 + ... + 4254097680.

It is an arithmetic number, because the mean of its divisors is an integer number (14750333486798).

Almost surely, 2^{101111111211212} is an apocalyptic number.

It is an amenable number.

101111111211212 is a deficient number, since it is larger than the sum of its proper divisors (75892890630364).

101111111211212 is a wasteful number, since it uses less digits than its factorization.

101111111211212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8508174568 (or 8508174566 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 17.

Adding to 101111111211212 its reverse (212112111111101), we get a palindrome (313223222322313).

The spelling of 101111111211212 in words is "one hundred one trillion, one hundred eleven billion, one hundred eleven million, two hundred eleven thousand, two hundred twelve".