121221002003 has 4 divisors (see below), whose sum is σ = 127601054760. Its totient is φ = 114840949248.

The previous prime is 121221001939. The next prime is 121221002069. The reversal of 121221002003 is 300200122121.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 121221002003 - 2⁶ = 121221001939 is a prime.

It is a super-2 number, since 2×121221002003² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121221002093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3190026350 + ... + 3190026387.

It is an arithmetic number, because the mean of its divisors is an integer number (31900263690).

Almost surely, 2^121221002003 is an apocalyptic number.

121221002003 is a deficient number, since it is larger than the sum of its proper divisors (6380052757).

121221002003 is an equidigital number, since it uses as much as digits as its factorization.

121221002003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6380052756.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 121221002003 its reverse (300200122121), we get a palindrome (421421124124).

The spelling of 121221002003 in words is "one hundred twenty-one billion, two hundred twenty-one million, two thousand, three".