1100001222 has 56 divisors (see below), whose sum is σ = 2492381016. Its totient is φ = 363924576.

The previous prime is 1100001211. The next prime is 1100001239. The reversal of 1100001222 is 2221000011.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 196993 + ... + 202499.

Almost surely, 2^1100001222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1100001222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1246190508).

1100001222 is an abundant number, since it is smaller than the sum of its proper divisors (1392379794).

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

1100001222 is an equidigital number, since it uses as much as digits as its factorization.

1100001222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5664 (or 5649 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 1100001222 is about 33166.2663258920. The cubic root of 1100001222 is about 1032.2804977127.

Adding to 1100001222 its reverse (2221000011), we get a palindrome (3321001233).

The spelling of 1100001222 in words is "one billion, one hundred million, one thousand, two hundred twenty-two".