211212111021212 has 48 divisors (see below), whose sum is σ = 429965748215808. Its totient is φ = 88917548731200.

The previous prime is 211212111021211. The next prime is 211212111021253. The reversal of 211212111021212 is 212120111212112.

It is a happy number.

It is a super-2 number, since 2×211212111021212² (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 (211212111021211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 293680358 + ... + 294398669.

It is an arithmetic number, because the mean of its divisors is an integer number (8957619754496).

Almost surely, 2^{211212111021212} is an apocalyptic number.

It is an amenable number.

211212111021212 is an abundant number, since it is smaller than the sum of its proper divisors (218753637194596).

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

211212111021212 is a wasteful number, since it uses less digits than its factorization.

211212111021212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 588079266 (or 588079264 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 211212111021212 its reverse (212120111212112), we get a palindrome (423332222233324).

The spelling of 211212111021212 in words is "two hundred eleven trillion, two hundred twelve billion, one hundred eleven million, twenty-one thousand, two hundred twelve".