212202013121 has 12 divisors (see below), whose sum is σ = 247238475840. Its totient is φ = 181599160680.

The previous prime is 212202013081. The next prime is 212202013141. The reversal of 212202013121 is 121310202212.

It is a de Polignac number, because none of the positive numbers 2^k-212202013121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212202013121.

It is not an unprimeable number, because it can be changed into a prime (212202013141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3400661 + ... + 3462498.

It is an arithmetic number, because the mean of its divisors is an integer number (20603206320).

Almost surely, 2^212202013121 is an apocalyptic number.

It is an amenable number.

212202013121 is a deficient number, since it is larger than the sum of its proper divisors (35036462719).

212202013121 is an equidigital number, since it uses as much as digits as its factorization.

212202013121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6863804 (or 6863797 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 212202013121 its reverse (121310202212), we get a palindrome (333512215333).

The spelling of 212202013121 in words is "two hundred twelve billion, two hundred two million, thirteen thousand, one hundred twenty-one".