22121100343 has 4 divisors (see below), whose sum is σ = 22150169568. Its totient is φ = 22092031120.

The previous prime is 22121100319. The next prime is 22121100347. The reversal of 22121100343 is 34300112122.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34300112122 = 2 ⋅17150056061.

It is a cyclic number.

It is not a de Polignac number, because 22121100343 - 2²¹ = 22119003191 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22121100343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121100347) 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, 14533471 + ... + 14534992.

It is an arithmetic number, because the mean of its divisors is an integer number (5537542392).

Almost surely, 2^22121100343 is an apocalyptic number.

22121100343 is a deficient number, since it is larger than the sum of its proper divisors (29069225).

22121100343 is an equidigital number, since it uses as much as digits as its factorization.

22121100343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29069224.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 22121100343 its reverse (34300112122), we get a palindrome (56421212465).

The spelling of 22121100343 in words is "twenty-two billion, one hundred twenty-one million, one hundred thousand, three hundred forty-three".