121221210003 has 64 divisors (see below), whose sum is σ = 173429071872. Its totient is φ = 75177123840.

The previous prime is 121221209999. The next prime is 121221210017. The reversal of 121221210003 is 300012122121.

It is not a de Polignac number, because 121221210003 - 2² = 121221209999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121221210403) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 110906325 + ... + 110907417.

It is an arithmetic number, because the mean of its divisors is an integer number (2709829248).

Almost surely, 2^121221210003 is an apocalyptic number.

121221210003 is a deficient number, since it is larger than the sum of its proper divisors (52207861869).

121221210003 is a wasteful number, since it uses less digits than its factorization.

121221210003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1524.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 121221210003 its reverse (300012122121), we get a palindrome (421233332124).

The spelling of 121221210003 in words is "one hundred twenty-one billion, two hundred twenty-one million, two hundred ten thousand, three".