22111335421 has 4 divisors (see below), whose sum is σ = 25270097632. Its totient is φ = 18952573212.

The previous prime is 22111335409. The next prime is 22111335431. The reversal of 22111335421 is 12453311122.

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 22111335421 - 2¹³ = 22111327229 is a prime.

It is a super-4 number, since 4×22111335421⁴ (a number of 42 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22111335401) 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, 1579381095 + ... + 1579381108.

It is an arithmetic number, because the mean of its divisors is an integer number (6317524408).

Almost surely, 2^22111335421 is an apocalyptic number.

It is an amenable number.

22111335421 is a deficient number, since it is larger than the sum of its proper divisors (3158762211).

22111335421 is an equidigital number, since it uses as much as digits as its factorization.

22111335421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3158762210.

The product of its digits is 1440, while the sum is 25.

Adding to 22111335421 its reverse (12453311122), we get a palindrome (34564646543).

The spelling of 22111335421 in words is "twenty-two billion, one hundred eleven million, three hundred thirty-five thousand, four hundred twenty-one".