11531402120011 has 4 divisors (see below), whose sum is σ = 11531409085000. Its totient is φ = 11531395155024.

The previous prime is 11531402119973. The next prime is 11531402120033. The reversal of 11531402120011 is 11002120413511.

11531402120011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 11531402120011 - 2⁹ = 11531402119499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11531402100011) 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, 582880 + ... + 4837618.

It is an arithmetic number, because the mean of its divisors is an integer number (2882852271250).

Almost surely, 2^{11531402120011} is an apocalyptic number.

11531402120011 is a deficient number, since it is larger than the sum of its proper divisors (6964989).

11531402120011 is an equidigital number, since it uses as much as digits as its factorization.

11531402120011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6964988.

The product of its (nonzero) digits is 240, while the sum is 22.

Adding to 11531402120011 its reverse (11002120413511), we get a palindrome (22533522533522).

The spelling of 11531402120011 in words is "eleven trillion, five hundred thirty-one billion, four hundred two million, one hundred twenty thousand, eleven".