100440400123 has 8 divisors (see below), whose sum is σ = 114825645792. Its totient is φ = 86064308736.

The previous prime is 100440400097. The next prime is 100440400139. The reversal of 100440400123 is 321004044001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 100440400123 - 2¹⁷ = 100440269051 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 100440400123.

It is not an unprimeable number, because it can be changed into a prime (100440400153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2265040 + ... + 2308957.

It is an arithmetic number, because the mean of its divisors is an integer number (14353205724).

Almost surely, 2^100440400123 is an apocalyptic number.

100440400123 is a deficient number, since it is larger than the sum of its proper divisors (14385245669).

100440400123 is an equidigital number, since it uses as much as digits as its factorization.

100440400123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4577141.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 100440400123 its reverse (321004044001), we get a palindrome (421444444124).

The spelling of 100440400123 in words is "one hundred billion, four hundred forty million, four hundred thousand, one hundred twenty-three".