211212212120212 has 6 divisors (see below), whose sum is σ = 369621371210378. Its totient is φ = 105606106060104.

The previous prime is 211212212120179. The next prime is 211212212120213. The reversal of 211212212120212 is 212021212212112.

It can be written as a sum of positive squares in only one way, i.e., 130428140024196 + 80784072096016 = 11420514^2 + 8987996^2 .

It is a super-2 number, since 2×211212212120212² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211212212120213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26401526515023 + ... + 26401526515030.

Almost surely, 2^{211212212120212} is an apocalyptic number.

It is an amenable number.

211212212120212 is a deficient number, since it is larger than the sum of its proper divisors (158409159090166).

211212212120212 is a wasteful number, since it uses less digits than its factorization.

211212212120212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52803053030057 (or 52803053030055 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 211212212120212 its reverse (212021212212112), we get a palindrome (423233424332324).

The spelling of 211212212120212 in words is "two hundred eleven trillion, two hundred twelve billion, two hundred twelve million, one hundred twenty thousand, two hundred twelve".