12021121002122 has 4 divisors (see below), whose sum is σ = 18031681503186. Its totient is φ = 6010560501060.

The previous prime is 12021121002119. The next prime is 12021121002139. The reversal of 12021121002122 is 22120012112021.

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

It can be written as a sum of positive squares in only one way, i.e., 9959458651321 + 2061662350801 = 3155861^2 + 1435849^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12021121002122.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3005280250529 + ... + 3005280250532.

Almost surely, 2^{12021121002122} is an apocalyptic number.

12021121002122 is a deficient number, since it is larger than the sum of its proper divisors (6010560501064).

12021121002122 is an equidigital number, since it uses as much as digits as its factorization.

12021121002122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6010560501063.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12021121002122 its reverse (22120012112021), we get a palindrome (34141133114143).

The spelling of 12021121002122 in words is "twelve trillion, twenty-one billion, one hundred twenty-one million, two thousand, one hundred twenty-two".