21140412401 has 2 divisors, whose sum is σ = 21140412402. Its totient is φ = 21140412400.

The previous prime is 21140412379. The next prime is 21140412409. The reversal of 21140412401 is 10421404112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17973424225 + 3166988176 = 134065^2 + 56276^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21140412401 is a prime.

It is not a weakly prime, because it can be changed into another prime (21140412409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10570206200 + 10570206201.

It is an arithmetic number, because the mean of its divisors is an integer number (10570206201).

Almost surely, 2^21140412401 is an apocalyptic number.

It is an amenable number.

21140412401 is a deficient number, since it is larger than the sum of its proper divisors (1).

21140412401 is an equidigital number, since it uses as much as digits as its factorization.

21140412401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21140412401 its reverse (10421404112), we get a palindrome (31561816513).

The spelling of 21140412401 in words is "twenty-one billion, one hundred forty million, four hundred twelve thousand, four hundred one".