12121211010112 has 14 divisors (see below), whose sum is σ = 24053028098318. Its totient is φ = 6060605505024.

The previous prime is 12121211010107. The next prime is 12121211010121. The reversal of 12121211010112 is 21101011212121.

It can be written as a sum of positive squares in only one way, i.e., 7368531966016 + 4752679044096 = 2714504^2 + 2180064^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94696960953 + ... + 94696961080.

Almost surely, 2^{12121211010112} is an apocalyptic number.

It is an amenable number.

12121211010112 is a deficient number, since it is larger than the sum of its proper divisors (11931817088206).

12121211010112 is an equidigital number, since it uses as much as digits as its factorization.

12121211010112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189393922045 (or 189393922035 counting only the distinct ones).

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

Adding to 12121211010112 its reverse (21101011212121), we get a palindrome (33222222222233).

It can be divided in two parts, 12121 and 211010112, that multiplied together give a palindrome (2557653567552).

The spelling of 12121211010112 in words is "twelve trillion, one hundred twenty-one billion, two hundred eleven million, ten thousand, one hundred twelve".