11143340511521 has 2 divisors, whose sum is σ = 11143340511522. Its totient is φ = 11143340511520.

The previous prime is 11143340511487. The next prime is 11143340511643. The reversal of 11143340511521 is 12511504334111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7837620180625 + 3305720330896 = 2799575^2 + 1818164^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11143340511521 is a prime.

It is not a weakly prime, because it can be changed into another prime (11143340511221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5571670255760 + 5571670255761.

It is an arithmetic number, because the mean of its divisors is an integer number (5571670255761).

Almost surely, 2^{11143340511521} is an apocalyptic number.

It is an amenable number.

11143340511521 is a deficient number, since it is larger than the sum of its proper divisors (1).

11143340511521 is an equidigital number, since it uses as much as digits as its factorization.

11143340511521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 32.

Adding to 11143340511521 its reverse (12511504334111), we get a palindrome (23654844845632).

The spelling of 11143340511521 in words is "eleven trillion, one hundred forty-three billion, three hundred forty million, five hundred eleven thousand, five hundred twenty-one".