11365905321 has 9 divisors (see below), whose sum is σ = 16417880791. Its totient is φ = 7577056992.

The previous prime is 11365905307. The next prime is 11365905371. The reversal of 11365905321 is 12350956311.

It is a happy number.

The square root of 11365905321 is 106611.

It is a perfect power (a square), and thus also a powerful number.

11365905321 is a `hidden beast` number, since 1 + 1 + 36 + 5 + 90 + 532 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 9317075625 + 2048829696 = 96525^2 + 45264^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 11365905321 - 2¹³ = 11365897129 is a prime.

It is a super-2 number, since 2×11365905321² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11365905371) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 302065 + ... + 337601.

Almost surely, 2^11365905321 is an apocalyptic number.

11365905321 is the 106611-st square number.

11365905321 is the 53306-th centered octagonal number.

It is an amenable number.

11365905321 is a deficient number, since it is larger than the sum of its proper divisors (5051975470).

11365905321 is an frugal number, since it uses more digits than its factorization.

11365905321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71080 (or 35540 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 36.

Multiplying 11365905321 by its sum of digits (36), we get a square (409172591556 = 639666²).

The spelling of 11365905321 in words is "eleven billion, three hundred sixty-five million, nine hundred five thousand, three hundred twenty-one".