1000222220 has 12 divisors (see below), whose sum is σ = 2100466704. Its totient is φ = 400088880.

The previous prime is 1000222219. The next prime is 1000222243. The reversal of 1000222220 is 222220001.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25005536 + ... + 25005575.

It is an arithmetic number, because the mean of its divisors is an integer number (175038892).

Almost surely, 2^1000222220 is an apocalyptic number.

1000222220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000222220 is an abundant number, since it is smaller than the sum of its proper divisors (1100244484).

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

1000222220 is a wasteful number, since it uses less digits than its factorization.

1000222220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50011120 (or 50011118 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 1000222220 is about 31626.2900132153. The cubic root of 1000222220 is about 1000.0740678472.

Adding to 1000222220 its reverse (222220001), we get a palindrome (1222442221).

The spelling of 1000222220 in words is "one billion, two hundred twenty-two thousand, two hundred twenty".