1100012221 has 24 divisors (see below), whose sum is σ = 1397904480. Its totient is φ = 855943200.

The previous prime is 1100012219. The next prime is 1100012267. The reversal of 1100012221 is 1222100011.

It is not a de Polignac number, because 1100012221 - 2¹ = 1100012219 is a prime.

1100012221 is a modest number, since divided by 12221 gives 11 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 1100012198 and 1100012207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100012281) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 677791 + ... + 679411.

It is an arithmetic number, because the mean of its divisors is an integer number (58246020).

Almost surely, 2^1100012221 is an apocalyptic number.

1100012221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1100012221 is a deficient number, since it is larger than the sum of its proper divisors (297892259).

1100012221 is a wasteful number, since it uses less digits than its factorization.

1100012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2905 (or 2898 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1100012221 is about 33166.4321415494. The cubic root of 1100012221 is about 1032.2839383196.

Adding to 1100012221 its reverse (1222100011), we get a palindrome (2322112232).

The spelling of 1100012221 in words is "one billion, one hundred million, twelve thousand, two hundred twenty-one".