21002241043 has 8 divisors (see below), whose sum is σ = 24030575712. Its totient is φ = 17980910016.

The previous prime is 21002241037. The next prime is 21002241049. The reversal of 21002241043 is 34014220012.

It is an interprime number because it is at equal distance from previous prime (21002241037) and next prime (21002241049).

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

It is a cyclic number.

It is not a de Polignac number, because 21002241043 - 2⁵ = 21002241011 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21002241043.

It is not an unprimeable number, because it can be changed into a prime (21002241049) 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, 1744480 + ... + 1756477.

It is an arithmetic number, because the mean of its divisors is an integer number (3003821964).

Almost surely, 2^21002241043 is an apocalyptic number.

21002241043 is a deficient number, since it is larger than the sum of its proper divisors (3028334669).

21002241043 is an equidigital number, since it uses as much as digits as its factorization.

21002241043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3501821.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 21002241043 its reverse (34014220012), we get a palindrome (55016461055).

The spelling of 21002241043 in words is "twenty-one billion, two million, two hundred forty-one thousand, forty-three".