221011110012 has 96 divisors (see below), whose sum is σ = 649307441664. Its totient is φ = 56837088000.

The previous prime is 221011109989. The next prime is 221011110029. The reversal of 221011110012 is 210011110122.

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 221011110012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1090783 + ... + 1277430.

It is an arithmetic number, because the mean of its divisors is an integer number (6763619184).

Almost surely, 2^221011110012 is an apocalyptic number.

221011110012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

221011110012 is an abundant number, since it is smaller than the sum of its proper divisors (428296331652).

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

221011110012 is a wasteful number, since it uses less digits than its factorization.

221011110012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2368339 (or 2368337 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 221011110012 its reverse (210011110122), we get a palindrome (431022220134).

The spelling of 221011110012 in words is "two hundred twenty-one billion, eleven million, one hundred ten thousand, twelve".