100513120405 has 4 divisors (see below), whose sum is σ = 120615744492. Its totient is φ = 80410496320.

The previous prime is 100513120397. The next prime is 100513120441. The reversal of 100513120405 is 504021315001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 504021315001 = 349 ⋅1444187149.

It can be written as a sum of positive squares in 2 ways, for example, as 44893558161 + 55619562244 = 211881^2 + 235838^2 .

It is not a de Polignac number, because 100513120405 - 2³ = 100513120397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10051312036 + ... + 10051312045.

It is an arithmetic number, because the mean of its divisors is an integer number (30153936123).

Almost surely, 2^100513120405 is an apocalyptic number.

It is an amenable number.

100513120405 is a deficient number, since it is larger than the sum of its proper divisors (20102624087).

100513120405 is an equidigital number, since it uses as much as digits as its factorization.

100513120405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20102624086.

The product of its (nonzero) digits is 600, while the sum is 22.

Adding to 100513120405 its reverse (504021315001), we get a palindrome (604534435406).

The spelling of 100513120405 in words is "one hundred billion, five hundred thirteen million, one hundred twenty thousand, four hundred five".