202421120243 has 4 divisors (see below), whose sum is σ = 202481135808. Its totient is φ = 202361104680.

The previous prime is 202421120227. The next prime is 202421120273. The reversal of 202421120243 is 342021124202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 342021124202 = 2 ⋅171010562101.

It is a cyclic number.

It is not a de Polignac number, because 202421120243 - 2⁴ = 202421120227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202421120273) 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, 30002723 + ... + 30009468.

It is an arithmetic number, because the mean of its divisors is an integer number (50620283952).

Almost surely, 2^202421120243 is an apocalyptic number.

202421120243 is a deficient number, since it is larger than the sum of its proper divisors (60015565).

202421120243 is an equidigital number, since it uses as much as digits as its factorization.

202421120243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60015564.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 202421120243 its reverse (342021124202), we get a palindrome (544442244445).

The spelling of 202421120243 in words is "two hundred two billion, four hundred twenty-one million, one hundred twenty thousand, two hundred forty-three".