21400330001 has 2 divisors, whose sum is σ = 21400330002. Its totient is φ = 21400330000.

The previous prime is 21400329991. The next prime is 21400330009. The reversal of 21400330001 is 10003300412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21388770001 + 11560000 = 146249^2 + 3400^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21400330001 is a prime.

It is not a weakly prime, because it can be changed into another prime (21400330009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10700165000 + 10700165001.

It is an arithmetic number, because the mean of its divisors is an integer number (10700165001).

Almost surely, 2^21400330001 is an apocalyptic number.

It is an amenable number.

21400330001 is a deficient number, since it is larger than the sum of its proper divisors (1).

21400330001 is an equidigital number, since it uses as much as digits as its factorization.

21400330001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 21400330001 its reverse (10003300412), we get a palindrome (31403630413).

The spelling of 21400330001 in words is "twenty-one billion, four hundred million, three hundred thirty thousand, one".