100121121103 has 4 divisors (see below), whose sum is σ = 100121886648. Its totient is φ = 100120355560.

The previous prime is 100121121071. The next prime is 100121121109. The reversal of 100121121103 is 301121121001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 100121121103 - 2⁵ = 100121121071 is a prime.

It is a super-3 number, since 3×100121121103³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100121121109) 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, 131701 + ... + 466462.

It is an arithmetic number, because the mean of its divisors is an integer number (25030471662).

Almost surely, 2^100121121103 is an apocalyptic number.

100121121103 is a deficient number, since it is larger than the sum of its proper divisors (765545).

100121121103 is an equidigital number, since it uses as much as digits as its factorization.

100121121103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 765544.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 100121121103 its reverse (301121121001), we get a palindrome (401242242104).

The spelling of 100121121103 in words is "one hundred billion, one hundred twenty-one million, one hundred twenty-one thousand, one hundred three".