1122021200 has 60 divisors (see below), whose sum is σ = 2729855040. Its totient is φ = 443114880.

The previous prime is 1122021181. The next prime is 1122021203. The reversal of 1122021200 is 21202211.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122021203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13847 + ... + 49353.

It is an arithmetic number, because the mean of its divisors is an integer number (45497584).

Almost surely, 2^1122021200 is an apocalyptic number.

1122021200 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 1122021200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1364927520).

1122021200 is an abundant number, since it is smaller than the sum of its proper divisors (1607833840).

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

1122021200 is a wasteful number, since it uses less digits than its factorization.

1122021200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35604 (or 35593 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1122021200 is about 33496.5849005537. The cubic root of 1122021200 is about 1039.1231514486.

Adding to 1122021200 its reverse (21202211), we get a palindrome (1143223411).

The spelling of 1122021200 in words is "one billion, one hundred twenty-two million, twenty-one thousand, two hundred".