12212000020121 has 6 divisors (see below), whose sum is σ = 13423107460266. Its totient is φ = 11101818200000.

The previous prime is 12212000020111. The next prime is 12212000020147. The reversal of 12212000020121 is 12102000021221.

It can be written as a sum of positive squares in only one way, i.e., 12000432218896 + 211567801225 = 3464164^2 + 459965^2 .

It is a de Polignac number, because none of the positive numbers 2^k-12212000020121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12212000020096 and 12212000020105.

It is not an unprimeable number, because it can be changed into a prime (12212000020111) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 50462809880 + ... + 50462810121.

It is an arithmetic number, because the mean of its divisors is an integer number (2237184576711).

Almost surely, 2^{12212000020121} is an apocalyptic number.

12212000020121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12212000020121 is a deficient number, since it is larger than the sum of its proper divisors (1211107440145).

12212000020121 is a wasteful number, since it uses less digits than its factorization.

12212000020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100925620023 (or 100925620012 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 12212000020121 its reverse (12102000021221), we get a palindrome (24314000041342).

The spelling of 12212000020121 in words is "twelve trillion, two hundred twelve billion, twenty thousand, one hundred twenty-one".