12121122112102 has 4 divisors (see below), whose sum is σ = 18181683168156. Its totient is φ = 6060561056050.

The previous prime is 12121122112079. The next prime is 12121122112103. The reversal of 12121122112102 is 20121122112121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 12121122112102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121122112103) by changing a digit.

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, 3030280528024 + ... + 3030280528027.

It is an arithmetic number, because the mean of its divisors is an integer number (4545420792039).

Almost surely, 2^{12121122112102} is an apocalyptic number.

12121122112102 is a deficient number, since it is larger than the sum of its proper divisors (6060561056054).

12121122112102 is an equidigital number, since it uses as much as digits as its factorization.

12121122112102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6060561056053.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 12121122112102 its sum of digits (19), we get a palindrome (12121122112121).

Adding to 12121122112102 its reverse (20121122112121), we get a palindrome (32242244224223).

The spelling of 12121122112102 in words is "twelve trillion, one hundred twenty-one billion, one hundred twenty-two million, one hundred twelve thousand, one hundred two".