21144141430397 has 2 divisors, whose sum is σ = 21144141430398. Its totient is φ = 21144141430396.

The previous prime is 21144141430381. The next prime is 21144141430483. The reversal of 21144141430397 is 79303414144112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14967156925081 + 6176984505316 = 3868741^2 + 2485354^2 .

It is a cyclic number.

It is not a de Polignac number, because 21144141430397 - 2⁴ = 21144141430381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21144141433397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10572070715198 + 10572070715199.

It is an arithmetic number, because the mean of its divisors is an integer number (10572070715199).

Almost surely, 2^{21144141430397} is an apocalyptic number.

It is an amenable number.

21144141430397 is a deficient number, since it is larger than the sum of its proper divisors (1).

21144141430397 is an equidigital number, since it uses as much as digits as its factorization.

21144141430397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 44.

The spelling of 21144141430397 in words is "twenty-one trillion, one hundred forty-four billion, one hundred forty-one million, four hundred thirty thousand, three hundred ninety-seven".