14140020821 has 2 divisors, whose sum is σ = 14140020822. Its totient is φ = 14140020820.

The previous prime is 14140020803. The next prime is 14140020859. The reversal of 14140020821 is 12802004141.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11468268100 + 2671752721 = 107090^2 + 51689^2 .

It is an emirp because it is prime and its reverse (12802004141) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 14140020821 - 2¹⁰ = 14140019797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14140020221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7070010410 + 7070010411.

It is an arithmetic number, because the mean of its divisors is an integer number (7070010411).

Almost surely, 2^14140020821 is an apocalyptic number.

It is an amenable number.

14140020821 is a deficient number, since it is larger than the sum of its proper divisors (1).

14140020821 is an equidigital number, since it uses as much as digits as its factorization.

14140020821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 14140020821 its reverse (12802004141), we get a palindrome (26942024962).

The spelling of 14140020821 in words is "fourteen billion, one hundred forty million, twenty thousand, eight hundred twenty-one".