221200020012 has 24 divisors (see below), whose sum is σ = 523836865216. Its totient is φ = 72632842128.

The previous prime is 221200019993. The next prime is 221200020029. The reversal of 221200020012 is 210020002122.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a self number, because there is not a number n which added to its sum of digits gives 221200020012.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137561398 + ... + 137563005.

Almost surely, 2^221200020012 is an apocalyptic number.

It is an amenable number.

221200020012 is an abundant number, since it is smaller than the sum of its proper divisors (302636845204).

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

221200020012 is a wasteful number, since it uses less digits than its factorization.

221200020012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275124477 (or 275124475 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 221200020012 its reverse (210020002122), we get a palindrome (431220022134).

The spelling of 221200020012 in words is "two hundred twenty-one billion, two hundred million, twenty thousand, twelve".