211212201022212 has 144 divisors (see below), whose sum is σ = 560992224703680. Its totient is φ = 61474491945216.

The previous prime is 211212201022169. The next prime is 211212201022213. The reversal of 211212201022212 is 212220102212112.

It is a super-2 number, since 2×211212201022212² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211212201022213) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 34266658 + ... + 39957830.

It is an arithmetic number, because the mean of its divisors is an integer number (3895779338220).

Almost surely, 2^{211212201022212} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211212201022212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (280496112351840).

211212201022212 is an abundant number, since it is smaller than the sum of its proper divisors (349780023681468).

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

211212201022212 is a wasteful number, since it uses less digits than its factorization.

211212201022212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5691890 (or 5691869 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 211212201022212 its reverse (212220102212112), we get a palindrome (423432303234324).

The spelling of 211212201022212 in words is "two hundred eleven trillion, two hundred twelve billion, two hundred one million, twenty-two thousand, two hundred twelve".