1122442100 has 144 divisors (see below), whose sum is σ = 2858150400. Its totient is φ = 378846720.

The previous prime is 1122442093. The next prime is 1122442169. The reversal of 1122442100 is 12442211.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 715517 + ... + 717083.

Almost surely, 2^1122442100 is an apocalyptic number.

1122442100 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 1122442100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1429075200).

1122442100 is an abundant number, since it is smaller than the sum of its proper divisors (1735708300).

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

1122442100 is a wasteful number, since it uses less digits than its factorization.

1122442100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1642 (or 1635 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 1122442100 is about 33502.8670414936. The cubic root of 1122442100 is about 1039.2530694503.

Adding to 1122442100 its reverse (12442211), we get a palindrome (1134884311).

The spelling of 1122442100 in words is "one billion, one hundred twenty-two million, four hundred forty-two thousand, one hundred".