1000022221 has 16 divisors (see below), whose sum is σ = 1141319808. Its totient is φ = 867328000.

The previous prime is 1000022213. The next prime is 1000022237. The reversal of 1000022221 is 1222200001.

It is not a de Polignac number, because 1000022221 - 2³ = 1000022213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1000022198 and 1000022207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000020221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96525 + ... + 106381.

It is an arithmetic number, because the mean of its divisors is an integer number (71332488).

Almost surely, 2^1000022221 is an apocalyptic number.

1000022221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1000022221 is a deficient number, since it is larger than the sum of its proper divisors (141297587).

1000022221 is a wasteful number, since it uses less digits than its factorization.

1000022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10292.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 1000022221 is about 31623.1279445914. The cubic root of 1000022221 is about 1000.0074069451.

Adding to 1000022221 its reverse (1222200001), we get a palindrome (2222222222).

The spelling of 1000022221 in words is "one billion, twenty-two thousand, two hundred twenty-one".