21134230134397 has 2 divisors, whose sum is σ = 21134230134398. Its totient is φ = 21134230134396.

The previous prime is 21134230134383. The next prime is 21134230134497. The reversal of 21134230134397 is 79343103243112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18672864506521 + 2461365627876 = 4321211^2 + 1568874^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21134230134397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21134230134337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10567115067198 + 10567115067199.

It is an arithmetic number, because the mean of its divisors is an integer number (10567115067199).

Almost surely, 2^{21134230134397} is an apocalyptic number.

It is an amenable number.

21134230134397 is a deficient number, since it is larger than the sum of its proper divisors (1).

21134230134397 is an equidigital number, since it uses as much as digits as its factorization.

21134230134397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 43.

The spelling of 21134230134397 in words is "twenty-one trillion, one hundred thirty-four billion, two hundred thirty million, one hundred thirty-four thousand, three hundred ninety-seven".