2421012101243 has 4 divisors (see below), whose sum is σ = 2427333282048. Its totient is φ = 2414690920440.

The previous prime is 2421012101161. The next prime is 2421012101257. The reversal of 2421012101243 is 3421012101242.

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 2421012101243 - 2¹⁰ = 2421012100219 is a prime.

It is a super-3 number, since 3×2421012101243³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2421012101273) 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, 3160589828 + ... + 3160590593.

It is an arithmetic number, because the mean of its divisors is an integer number (606833320512).

Almost surely, 2^{2421012101243} is an apocalyptic number.

2421012101243 is a deficient number, since it is larger than the sum of its proper divisors (6321180805).

2421012101243 is an equidigital number, since it uses as much as digits as its factorization.

2421012101243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6321180804.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 2421012101243 its reverse (3421012101242), we get a palindrome (5842024202485).

Subtracting 2421012101243 from its reverse (3421012101242), we obtain a palindrome (999999999999).

The spelling of 2421012101243 in words is "two trillion, four hundred twenty-one billion, twelve million, one hundred one thousand, two hundred forty-three".