20112222012 has 12 divisors (see below), whose sum is σ = 46928518056. Its totient is φ = 6704074000.

The previous prime is 20112221993. The next prime is 20112222029. The reversal of 20112222012 is 21022221102.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 20112221982 and 20112222000.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 838009239 + ... + 838009262.

It is an arithmetic number, because the mean of its divisors is an integer number (3910709838).

Almost surely, 2^20112222012 is an apocalyptic number.

It is an amenable number.

20112222012 is an abundant number, since it is smaller than the sum of its proper divisors (26816296044).

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

20112222012 is a wasteful number, since it uses less digits than its factorization.

20112222012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1676018508 (or 1676018506 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20112222012 its reverse (21022221102), we get a palindrome (41134443114).

The spelling of 20112222012 in words is "twenty billion, one hundred twelve million, two hundred twenty-two thousand, twelve".