221120022012 has 48 divisors (see below), whose sum is σ = 523793598720. Its totient is φ = 72586305792.

The previous prime is 221120021987. The next prime is 221120022061. The reversal of 221120022012 is 210220021122.

It is a junction number, because it is equal to n+sod(n) for n = 221120021982 and 221120022000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2992164 + ... + 3065172.

It is an arithmetic number, because the mean of its divisors is an integer number (10912366640).

Almost surely, 2^221120022012 is an apocalyptic number.

It is an amenable number.

221120022012 is an abundant number, since it is smaller than the sum of its proper divisors (302673576708).

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

221120022012 is a wasteful number, since it uses less digits than its factorization.

221120022012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76850 (or 76848 counting only the distinct ones).

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

Adding to 221120022012 its reverse (210220021122), we get a palindrome (431340043134).

The spelling of 221120022012 in words is "two hundred twenty-one billion, one hundred twenty million, twenty-two thousand, twelve".