1211201031103 has 16 divisors (see below), whose sum is σ = 1389748207680. Its totient is φ = 1034034241536.

The previous prime is 1211201031013. The next prime is 1211201031221. The reversal of 1211201031103 is 3011301021121.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1211201031103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211201032103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23773525 + ... + 23824417.

It is an arithmetic number, because the mean of its divisors is an integer number (86859262980).

Almost surely, 2^{1211201031103} is an apocalyptic number.

1211201031103 is a deficient number, since it is larger than the sum of its proper divisors (178547176577).

1211201031103 is a wasteful number, since it uses less digits than its factorization.

1211201031103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64386.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 1211201031103 its reverse (3011301021121), we get a palindrome (4222502052224).

The spelling of 1211201031103 in words is "one trillion, two hundred eleven billion, two hundred one million, thirty-one thousand, one hundred three".