11201611275521 has 2 divisors, whose sum is σ = 11201611275522. Its totient is φ = 11201611275520.

The previous prime is 11201611275509. The next prime is 11201611275527. The reversal of 11201611275521 is 12557211610211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8270800810000 + 2930810465521 = 2875900^2 + 1711961^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11201611275521 is a prime.

It is not a weakly prime, because it can be changed into another prime (11201611275527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5600805637760 + 5600805637761.

It is an arithmetic number, because the mean of its divisors is an integer number (5600805637761).

Almost surely, 2^{11201611275521} is an apocalyptic number.

It is an amenable number.

11201611275521 is a deficient number, since it is larger than the sum of its proper divisors (1).

11201611275521 is an equidigital number, since it uses as much as digits as its factorization.

11201611275521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8400, while the sum is 35.

Adding to 11201611275521 its reverse (12557211610211), we get a palindrome (23758822885732).

The spelling of 11201611275521 in words is "eleven trillion, two hundred one billion, six hundred eleven million, two hundred seventy-five thousand, five hundred twenty-one".