221212101102212 has 12 divisors (see below), whose sum is σ = 422314011195216. Its totient is φ = 100550955046440.

The previous prime is 221212101102137. The next prime is 221212101102227. The reversal of 221212101102212 is 212201101212122.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2513773876118 + ... + 2513773876205.

It is an arithmetic number, because the mean of its divisors is an integer number (35192834266268).

Almost surely, 2^{221212101102212} is an apocalyptic number.

221212101102212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

221212101102212 is a deficient number, since it is larger than the sum of its proper divisors (201101910093004).

221212101102212 is a wasteful number, since it uses less digits than its factorization.

221212101102212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5027547752338 (or 5027547752336 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 221212101102212 its reverse (212201101212122), we get a palindrome (433413202314334).

The spelling of 221212101102212 in words is "two hundred twenty-one trillion, two hundred twelve billion, one hundred one million, one hundred two thousand, two hundred twelve".