1322201100 has 144 divisors (see below), whose sum is σ = 4215730176. Its totient is φ = 317280000.

The previous prime is 1322201099. The next prime is 1322201107. The reversal of 1322201100 is 11022231.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (1322201107) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 331317 + ... + 335283.

It is an arithmetic number, because the mean of its divisors is an integer number (29275904).

Almost surely, 2^1322201100 is an apocalyptic number.

1322201100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1322201100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2107865088).

1322201100 is an abundant number, since it is smaller than the sum of its proper divisors (2893529076).

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

1322201100 is a wasteful number, since it uses less digits than its factorization.

1322201100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4096 (or 4089 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1322201100 is about 36362.0832736520. The cubic root of 1322201100 is about 1097.5706995549.

Adding to 1322201100 its reverse (11022231), we get a palindrome (1333223331).

The spelling of 1322201100 in words is "one billion, three hundred twenty-two million, two hundred one thousand, one hundred".