1212221000211 has 16 divisors (see below), whose sum is σ = 1740703421184. Its totient is φ = 745948556064.

The previous prime is 1212221000209. The next prime is 1212221000251. The reversal of 1212221000211 is 1120001222121.

It is not a de Polignac number, because 1212221000211 - 2¹ = 1212221000209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1212221000251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 191440 + ... + 1568786.

It is an arithmetic number, because the mean of its divisors is an integer number (108793963824).

Almost surely, 2^{1212221000211} is an apocalyptic number.

1212221000211 is a deficient number, since it is larger than the sum of its proper divisors (528482420973).

1212221000211 is a wasteful number, since it uses less digits than its factorization.

1212221000211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1399930.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1212221000211 its reverse (1120001222121), we get a palindrome (2332222222332).

The spelling of 1212221000211 in words is "one trillion, two hundred twelve billion, two hundred twenty-one million, two hundred eleven", and thus it is an aban number.