11012311321 has 4 divisors (see below), whose sum is σ = 12013430544. Its totient is φ = 10011192100.

The previous prime is 11012311313. The next prime is 11012311337. The reversal of 11012311321 is 12311321011.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12311321011 = 11 ⋅1119211001.

It is a cyclic number.

It is not a de Polignac number, because 11012311321 - 2³ = 11012311313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11012311295 and 11012311304.

It is not an unprimeable number, because it can be changed into a prime (11012311301) 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, 500559595 + ... + 500559616.

It is an arithmetic number, because the mean of its divisors is an integer number (3003357636).

Almost surely, 2^11012311321 is an apocalyptic number.

11012311321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11012311321 is a deficient number, since it is larger than the sum of its proper divisors (1001119223).

11012311321 is a wasteful number, since it uses less digits than its factorization.

11012311321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001119222.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 11012311321 its reverse (12311321011), we get a palindrome (23323632332).

The spelling of 11012311321 in words is "eleven billion, twelve million, three hundred eleven thousand, three hundred twenty-one".