21102302241 has 48 divisors (see below), whose sum is σ = 31939981008. Its totient is φ = 13412044800.

The previous prime is 21102302231. The next prime is 21102302261. The reversal of 21102302241 is 14220320112.

It is a happy number.

21102302241 is a `hidden beast` number, since 21 + 102 + 302 + 241 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 1055990016 + 20046312225 = 32496^2 + 141585^2 .

It is not a de Polignac number, because 21102302241 - 2¹⁰ = 21102301217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21102302231) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5706105 + ... + 5709801.

It is an arithmetic number, because the mean of its divisors is an integer number (665416271).

Almost surely, 2^21102302241 is an apocalyptic number.

It is an amenable number.

21102302241 is a deficient number, since it is larger than the sum of its proper divisors (10837678767).

21102302241 is a wasteful number, since it uses less digits than its factorization.

21102302241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4082 (or 4079 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21102302241 its reverse (14220320112), we get a palindrome (35322622353).

The spelling of 21102302241 in words is "twenty-one billion, one hundred two million, three hundred two thousand, two hundred forty-one".