1212220220212 has 6 divisors (see below), whose sum is σ = 2121385385378. Its totient is φ = 606110110104.

The previous prime is 1212220220147. The next prime is 1212220220251. The reversal of 1212220220212 is 2120220222121.

It can be written as a sum of positive squares in only one way, i.e., 713676902436 + 498543317776 = 844794^2 + 706076^2 .

It is a super-3 number, since 3×1212220220212³ (a number of 37 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1212220220212.

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, 151527527523 + ... + 151527527530.

Almost surely, 2^{1212220220212} is an apocalyptic number.

It is an amenable number.

1212220220212 is a deficient number, since it is larger than the sum of its proper divisors (909165165166).

1212220220212 is a wasteful number, since it uses less digits than its factorization.

1212220220212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303055055057 (or 303055055055 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 1212220220212 its reverse (2120220222121), we get a palindrome (3332440442333).

The spelling of 1212220220212 in words is "one trillion, two hundred twelve billion, two hundred twenty million, two hundred twenty thousand, two hundred twelve".