212220021112 has 24 divisors (see below), whose sum is σ = 437374942200. Its totient is φ = 96463645520.

The previous prime is 212220021077. The next prime is 212220021119. The reversal of 212220021112 is 211120022212.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212220021119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 109616812 + ... + 109618747.

It is an arithmetic number, because the mean of its divisors is an integer number (18223955925).

Almost surely, 2^212220021112 is an apocalyptic number.

212220021112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

212220021112 is an abundant number, since it is smaller than the sum of its proper divisors (225154921088).

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

212220021112 is a wasteful number, since it uses less digits than its factorization.

212220021112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219235587 (or 219235572 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 212220021112 its reverse (211120022212), we get a palindrome (423340043324).

The spelling of 212220021112 in words is "two hundred twelve billion, two hundred twenty million, twenty-one thousand, one hundred twelve".