11365136921 has 8 divisors (see below), whose sum is σ = 11527899264. Its totient is φ = 11202449440.

The previous prime is 11365136897. The next prime is 11365136927. The reversal of 11365136921 is 12963156311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11365136921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11365136927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 334316 + ... + 366738.

It is an arithmetic number, because the mean of its divisors is an integer number (1440987408).

Almost surely, 2^11365136921 is an apocalyptic number.

It is an amenable number.

11365136921 is a deficient number, since it is larger than the sum of its proper divisors (162762343).

11365136921 is an equidigital number, since it uses as much as digits as its factorization.

11365136921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37431.

The product of its digits is 29160, while the sum is 38.

The spelling of 11365136921 in words is "eleven billion, three hundred sixty-five million, one hundred thirty-six thousand, nine hundred twenty-one".