2421100643 has 4 divisors (see below), whose sum is σ = 2607339168. Its totient is φ = 2234862120.

The previous prime is 2421100637. The next prime is 2421100657. The reversal of 2421100643 is 3460011242.

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 2421100643 - 2¹² = 2421096547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2421100603) 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, 93119243 + ... + 93119268.

It is an arithmetic number, because the mean of its divisors is an integer number (651834792).

Almost surely, 2^2421100643 is an apocalyptic number.

2421100643 is a deficient number, since it is larger than the sum of its proper divisors (186238525).

2421100643 is a wasteful number, since it uses less digits than its factorization.

2421100643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186238524.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 2421100643 is about 49204.6811086100. The cubic root of 2421100643 is about 1342.7781973837.

Adding to 2421100643 its reverse (3460011242), we get a palindrome (5881111885).

The spelling of 2421100643 in words is "two billion, four hundred twenty-one million, one hundred thousand, six hundred forty-three".