1211103230011 has 6 divisors (see below), whose sum is σ = 1241362800836. Its totient is φ = 1181564125200.

The previous prime is 1211103230003. The next prime is 1211103230027. The reversal of 1211103230011 is 1100323011121.

It is a happy number.

It is not a de Polignac number, because 1211103230011 - 2³ = 1211103230003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211103231011) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 360231285 + ... + 360234646.

Almost surely, 2^{1211103230011} is an apocalyptic number.

1211103230011 is a deficient number, since it is larger than the sum of its proper divisors (30259570825).

1211103230011 is an frugal number, since it uses more digits than its factorization.

1211103230011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720466013 (or 720465972 counting only the distinct ones).

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

Adding to 1211103230011 its reverse (1100323011121), we get a palindrome (2311426241132).

The spelling of 1211103230011 in words is "one trillion, two hundred eleven billion, one hundred three million, two hundred thirty thousand, eleven".