1220110111212 has 24 divisors (see below), whose sum is σ = 2865777395712. Its totient is φ = 404009970000.

The previous prime is 1220110111189. The next prime is 1220110111223. The reversal of 1220110111212 is 2121110110221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1220110111191 and 1220110111200.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 336673164 + ... + 336676787.

It is an arithmetic number, because the mean of its divisors is an integer number (119407391488).

Almost surely, 2^{1220110111212} is an apocalyptic number.

1220110111212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1220110111212 is an abundant number, since it is smaller than the sum of its proper divisors (1645667284500).

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

1220110111212 is a wasteful number, since it uses less digits than its factorization.

1220110111212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673350109 (or 673350107 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1220110111212 its reverse (2121110110221), we get a palindrome (3341220221433).

Subtracting 1220110111212 from its reverse (2121110110221), we obtain a palindrome (900999999009).

The spelling of 1220110111212 in words is "one trillion, two hundred twenty billion, one hundred ten million, one hundred eleven thousand, two hundred twelve".