21002214041 has 4 divisors (see below), whose sum is σ = 21002509584. Its totient is φ = 21001918500.

The previous prime is 21002214029. The next prime is 21002214049. The reversal of 21002214041 is 14041220012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 21002214041 - 2¹⁰ = 21002213017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21002214049) 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, 30566 + ... + 207216.

It is an arithmetic number, because the mean of its divisors is an integer number (5250627396).

Almost surely, 2^21002214041 is an apocalyptic number.

It is an amenable number.

21002214041 is a deficient number, since it is larger than the sum of its proper divisors (295543).

21002214041 is a wasteful number, since it uses less digits than its factorization.

21002214041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295542.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21002214041 its reverse (14041220012), we get a palindrome (35043434053).

The spelling of 21002214041 in words is "twenty-one billion, two million, two hundred fourteen thousand, forty-one".