21342412001 has 2 divisors, whose sum is σ = 21342412002. Its totient is φ = 21342412000.

The previous prime is 21342411991. The next prime is 21342412037. The reversal of 21342412001 is 10021424312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16783461601 + 4558950400 = 129551^2 + 67520^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21342412001 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (21342412081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10671206000 + 10671206001.

It is an arithmetic number, because the mean of its divisors is an integer number (10671206001).

Almost surely, 2^21342412001 is an apocalyptic number.

It is an amenable number.

21342412001 is a deficient number, since it is larger than the sum of its proper divisors (1).

21342412001 is an equidigital number, since it uses as much as digits as its factorization.

21342412001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21342412001 its reverse (10021424312), we get a palindrome (31363836313).

The spelling of 21342412001 in words is "twenty-one billion, three hundred forty-two million, four hundred twelve thousand, one".