100503440121 has 16 divisors (see below), whose sum is σ = 153211382784. Its totient is φ = 57406805904.

The previous prime is 100503440113. The next prime is 100503440183. The reversal of 100503440121 is 121044305001.

It is not a de Polignac number, because 100503440121 - 2³ = 100503440113 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (100503440021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 936711 + ... + 1038476.

It is an arithmetic number, because the mean of its divisors is an integer number (9575711424).

Almost surely, 2^100503440121 is an apocalyptic number.

It is an amenable number.

100503440121 is a deficient number, since it is larger than the sum of its proper divisors (52707942663).

100503440121 is a wasteful number, since it uses less digits than its factorization.

100503440121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1977620.

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 100503440121 its reverse (121044305001), we get a palindrome (221547745122).

The spelling of 100503440121 in words is "one hundred billion, five hundred three million, four hundred forty thousand, one hundred twenty-one".