21223125453243 has 8 divisors (see below), whose sum is σ = 32340000690688. Its totient is φ = 12127500258984.

The previous prime is 21223125453241. The next prime is 21223125453293. The reversal of 21223125453243 is 34235452132212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21223125453243 - 2¹ = 21223125453241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21223125453241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 505312510771 + ... + 505312510812.

It is an arithmetic number, because the mean of its divisors is an integer number (4042500086336).

Almost surely, 2^{21223125453243} is an apocalyptic number.

21223125453243 is a deficient number, since it is larger than the sum of its proper divisors (11116875237445).

21223125453243 is a wasteful number, since it uses less digits than its factorization.

21223125453243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010625021593.

The product of its digits is 345600, while the sum is 39.

Adding to 21223125453243 its reverse (34235452132212), we get a palindrome (55458577585455).

The spelling of 21223125453243 in words is "twenty-one trillion, two hundred twenty-three billion, one hundred twenty-five million, four hundred fifty-three thousand, two hundred forty-three".