21401401440113 has 2 divisors, whose sum is σ = 21401401440114. Its totient is φ = 21401401440112.

The previous prime is 21401401440079. The next prime is 21401401440127. The reversal of 21401401440113 is 31104410410412.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16665850958689 + 4735550481424 = 4082383^2 + 2176132^2 .

It is a cyclic number.

It is not a de Polignac number, because 21401401440113 - 2⁸ = 21401401439857 is a prime.

It is not a weakly prime, because it can be changed into another prime (21401401440163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10700700720056 + 10700700720057.

It is an arithmetic number, because the mean of its divisors is an integer number (10700700720057).

Almost surely, 2^{21401401440113} is an apocalyptic number.

It is an amenable number.

21401401440113 is a deficient number, since it is larger than the sum of its proper divisors (1).

21401401440113 is an equidigital number, since it uses as much as digits as its factorization.

21401401440113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 26.

Adding to 21401401440113 its reverse (31104410410412), we get a palindrome (52505811850525).

The spelling of 21401401440113 in words is "twenty-one trillion, four hundred one billion, four hundred one million, four hundred forty thousand, one hundred thirteen".