100440313121 has 4 divisors (see below), whose sum is σ = 106348566852. Its totient is φ = 94532059392.

The previous prime is 100440313063. The next prime is 100440313147. The reversal of 100440313121 is 121313044001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 81475993600 + 18964319521 = 285440^2 + 137711^2 .

It is a de Polignac number, because none of the positive numbers 2^k-100440313121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100440313093 and 100440313102.

It is not an unprimeable number, because it can be changed into a prime (100440313021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2954126840 + ... + 2954126873.

It is an arithmetic number, because the mean of its divisors is an integer number (26587141713).

Almost surely, 2^100440313121 is an apocalyptic number.

It is an amenable number.

100440313121 is a deficient number, since it is larger than the sum of its proper divisors (5908253731).

100440313121 is an equidigital number, since it uses as much as digits as its factorization.

100440313121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5908253730.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 100440313121 its reverse (121313044001), we get a palindrome (221753357122).

The spelling of 100440313121 in words is "one hundred billion, four hundred forty million, three hundred thirteen thousand, one hundred twenty-one".