11111304421 has 4 divisors (see below), whose sum is σ = 12698633632. Its totient is φ = 9523975212.

The previous prime is 11111304403. The next prime is 11111304433. The reversal of 11111304421 is 12440311111.

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.

It is a cyclic number.

It is not a de Polignac number, because 11111304421 - 2¹⁵ = 11111271653 is a prime.

It is a super-2 number, since 2×11111304421² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111304401) 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, 793664595 + ... + 793664608.

It is an arithmetic number, because the mean of its divisors is an integer number (3174658408).

Almost surely, 2^11111304421 is an apocalyptic number.

It is an amenable number.

11111304421 is a deficient number, since it is larger than the sum of its proper divisors (1587329211).

11111304421 is an equidigital number, since it uses as much as digits as its factorization.

11111304421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1587329210.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 11111304421 its reverse (12440311111), we get a palindrome (23551615532).

The spelling of 11111304421 in words is "eleven billion, one hundred eleven million, three hundred four thousand, four hundred twenty-one".