11220311421 has 24 divisors (see below), whose sum is σ = 18449211456. Its totient is φ = 6504527040.

The previous prime is 11220311413. The next prime is 11220311437. The reversal of 11220311421 is 12411302211.

11220311421 is a `hidden beast` number, since 11 + 220 + 3 + 11 + 421 = 666.

It is not a de Polignac number, because 11220311421 - 2³ = 11220311413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11220311394 and 11220311403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11220311411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2461560 + ... + 2466113.

It is an arithmetic number, because the mean of its divisors is an integer number (768717144).

Almost surely, 2^11220311421 is an apocalyptic number.

11220311421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11220311421 is a deficient number, since it is larger than the sum of its proper divisors (7228900035).

11220311421 is a wasteful number, since it uses less digits than its factorization.

11220311421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4927713 (or 4927710 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 11220311421 its reverse (12411302211), we get a palindrome (23631613632).

The spelling of 11220311421 in words is "eleven billion, two hundred twenty million, three hundred eleven thousand, four hundred twenty-one".