11774521321 has 4 divisors (see below), whose sum is σ = 11800063044. Its totient is φ = 11748979600.

The previous prime is 11774521303. The next prime is 11774521337. The reversal of 11774521321 is 12312547711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12312547711 = 40531 ⋅303781.

It can be written as a sum of positive squares in 2 ways, for example, as 1525996096 + 10248525225 = 39064^2 + 101235^2 .

It is a cyclic number.

It is not a de Polignac number, because 11774521321 - 2¹³ = 11774513129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11774581321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12770170 + ... + 12771091.

It is an arithmetic number, because the mean of its divisors is an integer number (2950015761).

Almost surely, 2^11774521321 is an apocalyptic number.

It is an amenable number.

11774521321 is a deficient number, since it is larger than the sum of its proper divisors (25541723).

11774521321 is an equidigital number, since it uses as much as digits as its factorization.

11774521321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25541722.

The product of its digits is 11760, while the sum is 34.

The spelling of 11774521321 in words is "eleven billion, seven hundred seventy-four million, five hundred twenty-one thousand, three hundred twenty-one".