1100100123 has 24 divisors (see below), whose sum is σ = 1704721200. Its totient is φ = 708105888.

The previous prime is 1100100121. The next prime is 1100100137. The reversal of 1100100123 is 3210010011.

It is not a de Polignac number, because 1100100123 - 2¹ = 1100100121 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (1100100121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 71008 + ... + 85101.

It is an arithmetic number, because the mean of its divisors is an integer number (71030050).

Almost surely, 2^1100100123 is an apocalyptic number.

1100100123 is a deficient number, since it is larger than the sum of its proper divisors (604621077).

1100100123 is an equidigital number, since it uses as much as digits as its factorization.

1100100123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156153 (or 156141 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 1100100123 is about 33167.7572802262. The cubic root of 1100100123 is about 1032.3114341977.

Adding to 1100100123 its reverse (3210010011), we get a palindrome (4310110134).

The spelling of 1100100123 in words is "one billion, one hundred million, one hundred thousand, one hundred twenty-three".