1123901100 has 108 divisors (see below), whose sum is σ = 4026086064. Its totient is φ = 256890240.

The previous prime is 1123901087. The next prime is 1123901101. The reversal of 1123901100 is 11093211.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1123901101) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 82899 + ... + 95498.

Almost surely, 2^1123901100 is an apocalyptic number.

1123901100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1123901100 is an abundant number, since it is smaller than the sum of its proper divisors (2902184964).

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

1123901100 is a wasteful number, since it uses less digits than its factorization.

1123901100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178424 (or 178414 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 18.

The square root of 1123901100 is about 33524.6342261925. The cubic root of 1123901100 is about 1039.7031635593.

Adding to 1123901100 its reverse (11093211), we get a palindrome (1134994311).

The spelling of 1123901100 in words is "one billion, one hundred twenty-three million, nine hundred one thousand, one hundred".