221110111000 has 64 divisors (see below), whose sum is σ = 526167252000. Its totient is φ = 86944969600.

The previous prime is 221110110943. The next prime is 221110111097. The reversal of 221110111000 is 111011122.

It is a Harshad number since it is a multiple of its sum of digits (10).

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, 1814815 + ... + 1932814.

Almost surely, 2^221110111000 is an apocalyptic number.

221110111000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221110111000 is an abundant number, since it is smaller than the sum of its proper divisors (305057141000).

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

221110111000 is a wasteful number, since it uses less digits than its factorization.

221110111000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3747709 (or 3747695 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 221110111000 its reverse (111011122), we get a palindrome (221221122122).

The spelling of 221110111000 in words is "two hundred twenty-one billion, one hundred ten million, one hundred eleven thousand".