100121121003 has 4 divisors (see below), whose sum is σ = 133494828008. Its totient is φ = 66747414000.

The previous prime is 100121120993. The next prime is 100121121007. The reversal of 100121121003 is 300121121001.

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

It is not a de Polignac number, because 100121121003 - 2¹⁷ = 100120989931 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 100121121003.

It is not an unprimeable number, because it can be changed into a prime (100121121007) 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, 16686853498 + ... + 16686853503.

It is an arithmetic number, because the mean of its divisors is an integer number (33373707002).

Almost surely, 2^100121121003 is an apocalyptic number.

100121121003 is a deficient number, since it is larger than the sum of its proper divisors (33373707005).

100121121003 is an equidigital number, since it uses as much as digits as its factorization.

100121121003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33373707004.

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 100121121003 its reverse (300121121001), we get a palindrome (400242242004).

The spelling of 100121121003 in words is "one hundred billion, one hundred twenty-one million, one hundred twenty-one thousand, three".