11421311 has 8 divisors (see below), whose sum is σ = 12564048. Its totient is φ = 10381800.

The previous prime is 11421269. The next prime is 11421323. The reversal of 11421311 is 11312411.

It is not a de Polignac number, because 11421311 - 2¹⁸ = 11159167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11421211) 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, 2960 + ... + 5621.

It is an arithmetic number, because the mean of its divisors is an integer number (1570506).

Almost surely, 2^11421311 is an apocalyptic number.

11421311 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11421311 is a deficient number, since it is larger than the sum of its proper divisors (1142737).

11421311 is an frugal number, since it uses more digits than its factorization.

11421311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8614 (or 8592 counting only the distinct ones).

The product of its digits is 24, while the sum is 14.

The square root of 11421311 is about 3379.5430164447. The cubic root of 11421311 is about 225.2018665709.

Adding to 11421311 its reverse (11312411), we get a palindrome (22733722).

Subtracting from 11421311 its reverse (11312411), we obtain a square (108900 = 330²).

The spelling of 11421311 in words is "eleven million, four hundred twenty-one thousand, three hundred eleven".