1101223100 has 54 divisors (see below), whose sum is σ = 2449733832. Its totient is φ = 429680000.

The previous prime is 1101223087. The next prime is 1101223103. The reversal of 1101223100 is 13221011.

It is a super-2 number, since 2×1101223100² = 2425384631947220000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101223103) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 164825 + ... + 171375.

Almost surely, 2^1101223100 is an apocalyptic number.

1101223100 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 1101223100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1224866916).

1101223100 is an abundant number, since it is smaller than the sum of its proper divisors (1348510732).

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

1101223100 is a wasteful number, since it uses less digits than its factorization.

1101223100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6647 (or 6599 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 1101223100 is about 33184.6817070768. The cubic root of 1101223100 is about 1032.6625742865.

Adding to 1101223100 its reverse (13221011), we get a palindrome (1114444111).

The spelling of 1101223100 in words is "one billion, one hundred one million, two hundred twenty-three thousand, one hundred".