12212220212 has 6 divisors (see below), whose sum is σ = 21371385378. Its totient is φ = 6106110104.

The previous prime is 12212220143. The next prime is 12212220239. The reversal of 12212220212 is 21202221221.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 8029235236 + 4182984976 = 89606^2 + 64676^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1526527523 + ... + 1526527530.

It is an arithmetic number, because the mean of its divisors is an integer number (3561897563).

Almost surely, 2^12212220212 is an apocalyptic number.

It is an amenable number.

12212220212 is a deficient number, since it is larger than the sum of its proper divisors (9159165166).

12212220212 is a wasteful number, since it uses less digits than its factorization.

12212220212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3053055057 (or 3053055055 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 12212220212 its reverse (21202221221), we get a palindrome (33414441433).

The spelling of 12212220212 in words is "twelve billion, two hundred twelve million, two hundred twenty thousand, two hundred twelve".