22121354054243 has 4 divisors (see below), whose sum is σ = 22121539610688. Its totient is φ = 22121168497800.

The previous prime is 22121354054237. The next prime is 22121354054279. The reversal of 22121354054243 is 34245045312122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22121354054243 - 2⁶ = 22121354054179 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22121354054197 and 22121354054206.

It is not an unprimeable number, because it can be changed into a prime (22121354054203) 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, 92599283 + ... + 92837868.

It is an arithmetic number, because the mean of its divisors is an integer number (5530384902672).

Almost surely, 2^{22121354054243} is an apocalyptic number.

22121354054243 is a deficient number, since it is larger than the sum of its proper divisors (185556445).

22121354054243 is a wasteful number, since it uses less digits than its factorization.

22121354054243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185556444.

The product of its (nonzero) digits is 230400, while the sum is 38.

Adding to 22121354054243 its reverse (34245045312122), we get a palindrome (56366399366365).

The spelling of 22121354054243 in words is "twenty-two trillion, one hundred twenty-one billion, three hundred fifty-four million, fifty-four thousand, two hundred forty-three".