211212112021212 has 96 divisors (see below), whose sum is σ = 510142572785664. Its totient is φ = 67981494873600.

The previous prime is 211212112021201. The next prime is 211212112021231. The reversal of 211212112021212 is 212120211212112.

It is a super-2 number, since 2×211212112021212² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3388533 + ... + 20830419.

It is an arithmetic number, because the mean of its divisors is an integer number (5313985133184).

Almost surely, 2^{211212112021212} is an apocalyptic number.

It is an amenable number.

211212112021212 is an abundant number, since it is smaller than the sum of its proper divisors (298930460764452).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211212112021212 is a wasteful number, since it uses less digits than its factorization.

211212112021212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17442259 (or 17442257 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 211212112021212 its reverse (212120211212112), we get a palindrome (423332323233324).

The spelling of 211212112021212 in words is "two hundred eleven trillion, two hundred twelve billion, one hundred twelve million, twenty-one thousand, two hundred twelve".