121221102103 has 4 divisors (see below), whose sum is σ = 121425522768. Its totient is φ = 121016681440.

The previous prime is 121221102097. The next prime is 121221102143. The reversal of 121221102103 is 301201122121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121221102103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121221102143) 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, 102209443 + ... + 102210628.

It is an arithmetic number, because the mean of its divisors is an integer number (30356380692).

Almost surely, 2^121221102103 is an apocalyptic number.

121221102103 is a deficient number, since it is larger than the sum of its proper divisors (204420665).

121221102103 is an equidigital number, since it uses as much as digits as its factorization.

121221102103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204420664.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 121221102103 its reverse (301201122121), we get a palindrome (422422224224).

The spelling of 121221102103 in words is "one hundred twenty-one billion, two hundred twenty-one million, one hundred two thousand, one hundred three".