221000211111000 has 128 divisors (see below), whose sum is σ = 690244193995200. Its totient is φ = 58871549004800.

The previous prime is 221000211110971. The next prime is 221000211111037. The reversal of 221000211111000 is 111112000122.

It is a super-2 number, since 2×221000211111000² (a number of 29 digits) contains 22 as substring.

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 polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35790915 + ... + 41508914.

Almost surely, 2^{221000211111000} is an apocalyptic number.

221000211111000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221000211111000 is an abundant number, since it is smaller than the sum of its proper divisors (469243982884200).

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

221000211111000 is a wasteful number, since it uses less digits than its factorization.

221000211111000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77300806 (or 77300792 counting only the distinct ones).

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

Adding to 221000211111000 its reverse (111112000122), we get a palindrome (221111323111122).

The spelling of 221000211111000 in words is "two hundred twenty-one trillion, two hundred eleven million, one hundred eleven thousand".