11521320124205 has 32 divisors (see below), whose sum is σ = 14641210339200. Its totient is φ = 8679213994752.

The previous prime is 11521320124133. The next prime is 11521320124211. The reversal of 11521320124205 is 50242102312511.

It is a cyclic number.

It is not a de Polignac number, because 11521320124205 - 2²⁸ = 11521051688749 is a prime.

It is a super-2 number, since 2×11521320124205² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37478987 + ... + 37785143.

It is an arithmetic number, because the mean of its divisors is an integer number (457537823100).

Almost surely, 2^{11521320124205} is an apocalyptic number.

It is an amenable number.

11521320124205 is a deficient number, since it is larger than the sum of its proper divisors (3119890214995).

11521320124205 is a wasteful number, since it uses less digits than its factorization.

11521320124205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308573.

The product of its (nonzero) digits is 4800, while the sum is 29.

Adding to 11521320124205 its reverse (50242102312511), we get a palindrome (61763422436716).

The spelling of 11521320124205 in words is "eleven trillion, five hundred twenty-one billion, three hundred twenty million, one hundred twenty-four thousand, two hundred five".