121001100003 has 24 divisors (see below), whose sum is σ = 199833417056. Its totient is φ = 69113865600.

The previous prime is 121001100001. The next prime is 121001100049. The reversal of 121001100003 is 300001100121.

It is not a de Polignac number, because 121001100003 - 2¹ = 121001100001 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (121001100001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 262738 + ... + 557703.

Almost surely, 2^121001100003 is an apocalyptic number.

121001100003 is a deficient number, since it is larger than the sum of its proper divisors (78832317053).

121001100003 is a wasteful number, since it uses less digits than its factorization.

121001100003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 822795 (or 822792 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

Adding to 121001100003 its reverse (300001100121), we get a palindrome (421002200124).

The spelling of 121001100003 in words is "one hundred twenty-one billion, one million, one hundred thousand, three".