221122211000 has 128 divisors (see below), whose sum is σ = 530279006400. Its totient is φ = 86258188800.

The previous prime is 221122210999. The next prime is 221122211029. The reversal of 221122211000 is 112221122.

It is a zygodrome in base 10.

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, 30483374 + ... + 30490626.

Almost surely, 2^221122211000 is an apocalyptic number.

221122211000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221122211000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (265139503200).

221122211000 is an abundant number, since it is smaller than the sum of its proper divisors (309156795400).

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

221122211000 is a wasteful number, since it uses less digits than its factorization.

221122211000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8026 (or 8012 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 221122211000 its reverse (112221122), we get a palindrome (221234432122).

It can be divided in two parts, 2211222 and 11000, that added together give a palindrome (2222222).

The spelling of 221122211000 in words is "two hundred twenty-one billion, one hundred twenty-two million, two hundred eleven thousand".