221310111000 has 128 divisors (see below), whose sum is σ = 753259253760. Its totient is φ = 53650928000.

The previous prime is 221310110999. The next prime is 221310111017. The reversal of 221310111000 is 111013122.

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

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 31 ways as a sum of consecutive naturals, for example, 3320184 + ... + 3386183.

It is an arithmetic number, because the mean of its divisors is an integer number (5884837920).

Almost surely, 2^221310111000 is an apocalyptic number.

221310111000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221310111000 is an abundant number, since it is smaller than the sum of its proper divisors (531949142760).

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

221310111000 is a wasteful number, since it uses less digits than its factorization.

221310111000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6706402 (or 6706388 counting only the distinct ones).

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

Adding to 221310111000 its reverse (111013122), we get a palindrome (221421124122).

The spelling of 221310111000 in words is "two hundred twenty-one billion, three hundred ten million, one hundred eleven thousand".