221110112211212 has 12 divisors (see below), whose sum is σ = 442220224422480. Its totient is φ = 94761476661936.

The previous prime is 221110112211193. The next prime is 221110112211259. The reversal of 221110112211212 is 212112211011122.

It is a happy number.

221110112211212 is an admirable number.

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, 3948394860887 + ... + 3948394860942.

It is an arithmetic number, because the mean of its divisors is an integer number (36851685368540).

Almost surely, 2^{221110112211212} is an apocalyptic number.

It is an amenable number.

221110112211212 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221110112211212 is a wasteful number, since it uses less digits than its factorization.

221110112211212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7896789721840 (or 7896789721838 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 221110112211212 its reverse (212112211011122), we get a palindrome (433222323222334).

The spelling of 221110112211212 in words is "two hundred twenty-one trillion, one hundred ten billion, one hundred twelve million, two hundred eleven thousand, two hundred twelve".