222211021000 has 128 divisors (see below), whose sum is σ = 551026476000. Its totient is φ = 83725824000.

The previous prime is 222211020979. The next prime is 222211021013. The reversal of 222211021000 is 120112222.

It is a happy number.

It can be written as a sum of positive squares in 16 ways, for example, as 104511251524 + 117699769476 = 323282^2 + 343074^2 .

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, 1095556 + ... + 1282444.

Almost surely, 2^222211021000 is an apocalyptic number.

222211021000 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 222211021000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (275513238000).

222211021000 is an abundant number, since it is smaller than the sum of its proper divisors (328815455000).

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

222211021000 is a wasteful number, since it uses less digits than its factorization.

222211021000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186980 (or 186966 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 222211021000 its reverse (120112222), we get a palindrome (222331133222).

The spelling of 222211021000 in words is "two hundred twenty-two billion, two hundred eleven million, twenty-one thousand".