121001102100203 has 16 divisors (see below), whose sum is σ = 130987880352000. Its totient is φ = 111111531300000.

The previous prime is 121001102100121. The next prime is 121001102100253. The reversal of 121001102100203 is 302001201100121.

It is a cyclic number.

It is not a de Polignac number, because 121001102100203 - 2¹² = 121001102096107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121001102100253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9703328 + ... + 18334578.

It is an arithmetic number, because the mean of its divisors is an integer number (8186742522000).

Almost surely, 2^{121001102100203} is an apocalyptic number.

121001102100203 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

121001102100203 is a deficient number, since it is larger than the sum of its proper divisors (9986778251797).

121001102100203 is a wasteful number, since it uses less digits than its factorization.

121001102100203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8636882.

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

Adding to 121001102100203 its reverse (302001201100121), we get a palindrome (423002303200324).

The spelling of 121001102100203 in words is "one hundred twenty-one trillion, one billion, one hundred two million, one hundred thousand, two hundred three".