1001222205 has 32 divisors (see below), whose sum is σ = 1656630144. Its totient is φ = 516062976.

The previous prime is 1001222197. The next prime is 1001222207. The reversal of 1001222205 is 5022221001.

It is not a de Polignac number, because 1001222205 - 2³ = 1001222197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001222207) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43867 + ... + 62663.

It is an arithmetic number, because the mean of its divisors is an integer number (51769692).

Almost surely, 2^1001222205 is an apocalyptic number.

1001222205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1001222205 is a deficient number, since it is larger than the sum of its proper divisors (655407939).

1001222205 is a wasteful number, since it uses less digits than its factorization.

1001222205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18925.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 1001222205 is about 31642.0954584237. The cubic root of 1001222205 is about 1000.4072358032.

Adding to 1001222205 its reverse (5022221001), we get a palindrome (6023443206).

The spelling of 1001222205 in words is "one billion, one million, two hundred twenty-two thousand, two hundred five".