21002241101 has 8 divisors (see below), whose sum is σ = 21040627608. Its totient is φ = 20963880000.

The previous prime is 21002241083. The next prime is 21002241107. The reversal of 21002241101 is 10114220012.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 9531616900 + 11470624201 = 97630^2 + 107101^2 .

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 21002241101 - 2⁶ = 21002241037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21002241107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2478011 + ... + 2486471.

It is an arithmetic number, because the mean of its divisors is an integer number (2630078451).

Almost surely, 2^21002241101 is an apocalyptic number.

It is an amenable number.

21002241101 is a deficient number, since it is larger than the sum of its proper divisors (38386507).

21002241101 is an equidigital number, since it uses as much as digits as its factorization.

21002241101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12703.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21002241101 its reverse (10114220012), we get a palindrome (31116461113).

The spelling of 21002241101 in words is "twenty-one billion, two million, two hundred forty-one thousand, one hundred one".