1211441040011 has 4 divisors (see below), whose sum is σ = 1226775736800. Its totient is φ = 1196106343224.

The previous prime is 1211441039993. The next prime is 1211441040059. The reversal of 1211441040011 is 1100401441121.

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 1211441040011 - 2³⁸ = 936563133067 is a prime.

It is a super-3 number, since 3×1211441040011³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211441045011) 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, 7667348276 + ... + 7667348433.

It is an arithmetic number, because the mean of its divisors is an integer number (306693934200).

Almost surely, 2^{1211441040011} is an apocalyptic number.

1211441040011 is a deficient number, since it is larger than the sum of its proper divisors (15334696789).

1211441040011 is an equidigital number, since it uses as much as digits as its factorization.

1211441040011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15334696788.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 1211441040011 its reverse (1100401441121), we get a palindrome (2311842481132).

The spelling of 1211441040011 in words is "one trillion, two hundred eleven billion, four hundred forty-one million, forty thousand, eleven".