11540501321 has 16 divisors (see below), whose sum is σ = 12178252800. Its totient is φ = 10914763200.

The previous prime is 11540501267. The next prime is 11540501327. The reversal of 11540501321 is 12310504511.

It is a cyclic number.

It is not a de Polignac number, because 11540501321 - 2¹⁴ = 11540484937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11540501327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 756671 + ... + 771771.

It is an arithmetic number, because the mean of its divisors is an integer number (761140800).

Almost surely, 2^11540501321 is an apocalyptic number.

It is an amenable number.

11540501321 is a deficient number, since it is larger than the sum of its proper divisors (637751479).

11540501321 is a wasteful number, since it uses less digits than its factorization.

11540501321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15496.

The product of its (nonzero) digits is 600, while the sum is 23.

The spelling of 11540501321 in words is "eleven billion, five hundred forty million, five hundred one thousand, three hundred twenty-one".