21002241443 has 8 divisors (see below), whose sum is σ = 21118313520. Its totient is φ = 20886451360.

The previous prime is 21002241427. The next prime is 21002241457. The reversal of 21002241443 is 34414220012.

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 21002241443 - 2⁴ = 21002241427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21002241493) 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, 79748 + ... + 219918.

It is an arithmetic number, because the mean of its divisors is an integer number (2639789190).

Almost surely, 2^21002241443 is an apocalyptic number.

21002241443 is a deficient number, since it is larger than the sum of its proper divisors (116072077).

21002241443 is a wasteful number, since it uses less digits than its factorization.

21002241443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140997.

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

Adding to 21002241443 its reverse (34414220012), we get a palindrome (55416461455).

The spelling of 21002241443 in words is "twenty-one billion, two million, two hundred forty-one thousand, four hundred forty-three".