11321520145 has 16 divisors (see below), whose sum is σ = 14633594640. Its totient is φ = 8358960384.

The previous prime is 11321520127. The next prime is 11321520157. The reversal of 11321520145 is 54102512311.

It can be written as a sum of positive squares in 8 ways, for example, as 4585050369 + 6736469776 = 67713^2 + 82076^2 .

It is a cyclic number.

It is not a de Polignac number, because 11321520145 - 2¹⁵ = 11321487377 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 433807 + ... + 459163.

It is an arithmetic number, because the mean of its divisors is an integer number (914599665).

Almost surely, 2^11321520145 is an apocalyptic number.

It is an amenable number.

11321520145 is a deficient number, since it is larger than the sum of its proper divisors (3312074495).

11321520145 is a wasteful number, since it uses less digits than its factorization.

11321520145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32244.

The product of its (nonzero) digits is 1200, while the sum is 25.

The spelling of 11321520145 in words is "eleven billion, three hundred twenty-one million, five hundred twenty thousand, one hundred forty-five".