11506221526131 has 6 divisors (see below), whose sum is σ = 16620097759980. Its totient is φ = 7670814350748.

The previous prime is 11506221526127. The next prime is 11506221526169. The reversal of 11506221526131 is 13162512260511.

11506221526131 is a `hidden beast` number, since 1 + 1 + 5 + 0 + 6 + 22 + 15 + 2 + 613 + 1 = 666.

11506221526131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11506221526131 - 2² = 11506221526127 is a prime.

It is a super-2 number, since 2×11506221526131² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11506221526531) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 639234529221 + ... + 639234529238.

It is an arithmetic number, because the mean of its divisors is an integer number (2770016293330).

Almost surely, 2^{11506221526131} is an apocalyptic number.

11506221526131 is a deficient number, since it is larger than the sum of its proper divisors (5113876233849).

11506221526131 is a wasteful number, since it uses less digits than its factorization.

11506221526131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1278469058465 (or 1278469058462 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

Adding to 11506221526131 its reverse (13162512260511), we get a palindrome (24668733786642).

The spelling of 11506221526131 in words is "eleven trillion, five hundred six billion, two hundred twenty-one million, five hundred twenty-six thousand, one hundred thirty-one".