121221110003 has 8 divisors (see below), whose sum is σ = 138550450272. Its totient is φ = 103894779456.

The previous prime is 121221109987. The next prime is 121221110009. The reversal of 121221110003 is 300011122121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121221110003 - 2⁴ = 121221109987 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 121221110003.

It is not an unprimeable number, because it can be changed into a prime (121221110009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 665450 + ... + 827807.

It is an arithmetic number, because the mean of its divisors is an integer number (17318806284).

Almost surely, 2^121221110003 is an apocalyptic number.

121221110003 is a deficient number, since it is larger than the sum of its proper divisors (17329340269).

121221110003 is a wasteful number, since it uses less digits than its factorization.

121221110003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1504861.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 121221110003 its reverse (300011122121), we get a palindrome (421232232124).

The spelling of 121221110003 in words is "one hundred twenty-one billion, two hundred twenty-one million, one hundred ten thousand, three".