11521135422611 has 4 divisors (see below), whose sum is σ = 11562135904824. Its totient is φ = 11480134940400.

The previous prime is 11521135422593. The next prime is 11521135422661. The reversal of 11521135422611 is 11622453112511.

It is a happy number.

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 11521135422611 - 2¹⁴ = 11521135406227 is a prime.

It is a super-2 number, since 2×11521135422611² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11521135422661) 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, 20500240685 + ... + 20500241246.

It is an arithmetic number, because the mean of its divisors is an integer number (2890533976206).

Almost surely, 2^{11521135422611} is an apocalyptic number.

11521135422611 is a deficient number, since it is larger than the sum of its proper divisors (41000482213).

11521135422611 is an equidigital number, since it uses as much as digits as its factorization.

11521135422611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41000482212.

The product of its digits is 14400, while the sum is 35.

The spelling of 11521135422611 in words is "eleven trillion, five hundred twenty-one billion, one hundred thirty-five million, four hundred twenty-two thousand, six hundred eleven".