1121220300 has 144 divisors (see below), whose sum is σ = 3334286592. Its totient is φ = 290784000.

The previous prime is 1121220299. The next prime is 1121220311. The reversal of 1121220300 is 30221211.

It is a super-2 number, since 2×1121220300² = 2514269922264180000, which contains 22 as substring.

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

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, 2400667 + ... + 2401133.

It is an arithmetic number, because the mean of its divisors is an integer number (23154768).

Almost surely, 2^1121220300 is an apocalyptic number.

1121220300 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 1121220300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1667143296).

1121220300 is an abundant number, since it is smaller than the sum of its proper divisors (2213066292).

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

1121220300 is a wasteful number, since it uses less digits than its factorization.

1121220300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688 (or 681 counting only the distinct ones).

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

The square root of 1121220300 is about 33484.6278163578. The cubic root of 1121220300 is about 1038.8758501715.

Adding to 1121220300 its reverse (30221211), we get a palindrome (1151441511).

The spelling of 1121220300 in words is "one billion, one hundred twenty-one million, two hundred twenty thousand, three hundred".