1121313100 has 72 divisors (see below), whose sum is σ = 2508026976. Its totient is φ = 434880000.

The previous prime is 1121313091. The next prime is 1121313119. The reversal of 1121313100 is 13131211.

It is a super-2 number, since 2×1121313100² = 2514686136463220000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 741345 + ... + 742855.

It is an arithmetic number, because the mean of its divisors is an integer number (34833708).

Almost surely, 2^1121313100 is an apocalyptic number.

1121313100 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 1121313100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1254013488).

1121313100 is an abundant number, since it is smaller than the sum of its proper divisors (1386713876).

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

1121313100 is a wasteful number, since it uses less digits than its factorization.

1121313100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1747 (or 1740 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 1121313100 is about 33486.0134981756. The cubic root of 1121313100 is about 1038.9045109141.

Adding to 1121313100 its reverse (13131211), we get a palindrome (1134444311).

The spelling of 1121313100 in words is "one billion, one hundred twenty-one million, three hundred thirteen thousand, one hundred".