1211021300103 has 4 divisors (see below), whose sum is σ = 1614695066808. Its totient is φ = 807347533400.

The previous prime is 1211021300089. The next prime is 1211021300117. The reversal of 1211021300103 is 3010031201121.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (1211021300089) and next prime (1211021300117).

It is a cyclic number.

It is not a de Polignac number, because 1211021300103 - 2⁸ = 1211021299847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211021300303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 201836883348 + ... + 201836883353.

It is an arithmetic number, because the mean of its divisors is an integer number (403673766702).

Almost surely, 2^{1211021300103} is an apocalyptic number.

1211021300103 is a deficient number, since it is larger than the sum of its proper divisors (403673766705).

1211021300103 is an equidigital number, since it uses as much as digits as its factorization.

1211021300103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403673766704.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 1211021300103 its reverse (3010031201121), we get a palindrome (4221052501224).

The spelling of 1211021300103 in words is "one trillion, two hundred eleven billion, twenty-one million, three hundred thousand, one hundred three".