100242143121 has 4 divisors (see below), whose sum is σ = 133656190832. Its totient is φ = 66828095412.

The previous prime is 100242143093. The next prime is 100242143129. The reversal of 100242143121 is 121341242001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 100242143121 - 2¹³ = 100242134929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100242143129) 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, 16707023851 + ... + 16707023856.

It is an arithmetic number, because the mean of its divisors is an integer number (33414047708).

Almost surely, 2^100242143121 is an apocalyptic number.

It is an amenable number.

100242143121 is a deficient number, since it is larger than the sum of its proper divisors (33414047711).

100242143121 is an equidigital number, since it uses as much as digits as its factorization.

100242143121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33414047710.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 100242143121 its reverse (121341242001), we get a palindrome (221583385122).

The spelling of 100242143121 in words is "one hundred billion, two hundred forty-two million, one hundred forty-three thousand, one hundred twenty-one".