212202002112121 has 6 divisors (see below), whose sum is σ = 246847226946810. Its totient is φ = 181887430381776.

The previous prime is 212202002112029. The next prime is 212202002112253. The reversal of 212202002112121 is 121211200202212.

It can be written as a sum of positive squares in only one way, i.e., 167433377556025 + 44768624556096 = 12939605^2 + 6690936^2 .

It is not a de Polignac number, because 212202002112121 - 2³³ = 212193412177529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212202002112421) 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, 2165326552116 + ... + 2165326552213.

It is an arithmetic number, because the mean of its divisors is an integer number (41141204491135).

Almost surely, 2^{212202002112121} is an apocalyptic number.

It is an amenable number.

212202002112121 is a deficient number, since it is larger than the sum of its proper divisors (34645224834689).

212202002112121 is an equidigital number, since it uses as much as digits as its factorization.

212202002112121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4330653104343 (or 4330653104336 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 212202002112121 its reverse (121211200202212), we get a palindrome (333413202314333).

The spelling of 212202002112121 in words is "two hundred twelve trillion, two hundred two billion, two million, one hundred twelve thousand, one hundred twenty-one".