1211201100203 has 2 divisors, whose sum is σ = 1211201100204. Its totient is φ = 1211201100202.

The previous prime is 1211201100157. The next prime is 1211201100211. The reversal of 1211201100203 is 3020011021121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1211201100203 - 2²⁰ = 1211200051627 is a prime.

It is not a weakly prime, because it can be changed into another prime (1211201100253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605600550101 + 605600550102.

It is an arithmetic number, because the mean of its divisors is an integer number (605600550102).

Almost surely, 2^{1211201100203} is an apocalyptic number.

1211201100203 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211201100203 is an equidigital number, since it uses as much as digits as its factorization.

1211201100203 is an odious number, because the sum of its binary digits is odd.

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

Adding to 1211201100203 its reverse (3020011021121), we get a palindrome (4231212121324).

The spelling of 1211201100203 in words is "one trillion, two hundred eleven billion, two hundred one million, one hundred thousand, two hundred three".