1211320030103 has 4 divisors (see below), whose sum is σ = 1211385834648. Its totient is φ = 1211254225560.

The previous prime is 1211320030099. The next prime is 1211320030159. The reversal of 1211320030103 is 3010300231121.

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

It is a cyclic number.

It is not a de Polignac number, because 1211320030103 - 2² = 1211320030099 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 (1211320030163) 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, 32874653 + ... + 32911478.

It is an arithmetic number, because the mean of its divisors is an integer number (302846458662).

Almost surely, 2^{1211320030103} is an apocalyptic number.

1211320030103 is a deficient number, since it is larger than the sum of its proper divisors (65804545).

1211320030103 is an equidigital number, since it uses as much as digits as its factorization.

1211320030103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65804544.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 1211320030103 its reverse (3010300231121), we get a palindrome (4221620261224).

The spelling of 1211320030103 in words is "one trillion, two hundred eleven billion, three hundred twenty million, thirty thousand, one hundred three".