21334343230397 has 2 divisors, whose sum is σ = 21334343230398. Its totient is φ = 21334343230396.

The previous prime is 21334343230379. The next prime is 21334343230427. The reversal of 21334343230397 is 79303234343312.

Together with previous prime (21334343230379) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15225245018116 + 6109098212281 = 3901954^2 + 2471659^2 .

It is a cyclic number.

It is not a de Polignac number, because 21334343230397 - 2¹⁶ = 21334343164861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21334343230897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10667171615198 + 10667171615199.

It is an arithmetic number, because the mean of its divisors is an integer number (10667171615199).

Almost surely, 2^{21334343230397} is an apocalyptic number.

It is an amenable number.

21334343230397 is a deficient number, since it is larger than the sum of its proper divisors (1).

21334343230397 is an equidigital number, since it uses as much as digits as its factorization.

21334343230397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2939328, while the sum is 47.

The spelling of 21334343230397 in words is "twenty-one trillion, three hundred thirty-four billion, three hundred forty-three million, two hundred thirty thousand, three hundred ninety-seven".