1212221110211 has 16 divisors (see below), whose sum is σ = 1267992327168. Its totient is φ = 1157527120800.

The previous prime is 1212221110183. The next prime is 1212221110213. The reversal of 1212221110211 is 1120111222121.

It is a cyclic number.

It is not a de Polignac number, because 1212221110211 - 2⁶ = 1212221110147 is a prime.

It is a super-3 number, since 3×1212221110211³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1212221110211.

It is not an unprimeable number, because it can be changed into a prime (1212221110213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1755116 + ... + 2346246.

It is an arithmetic number, because the mean of its divisors is an integer number (79249520448).

Almost surely, 2^{1212221110211} is an apocalyptic number.

1212221110211 is a deficient number, since it is larger than the sum of its proper divisors (55771216957).

1212221110211 is an equidigital number, since it uses as much as digits as its factorization.

1212221110211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592042.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 1212221110211 its reverse (1120111222121), we get a palindrome (2332332332332).

The spelling of 1212221110211 in words is "one trillion, two hundred twelve billion, two hundred twenty-one million, one hundred ten thousand, two hundred eleven".