21134230134497 has 2 divisors, whose sum is σ = 21134230134498. Its totient is φ = 21134230134496.

The previous prime is 21134230134397. The next prime is 21134230134553. The reversal of 21134230134497 is 79443103243112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11632356069376 + 9501874065121 = 3410624^2 + 3082511^2 .

It is a cyclic number.

It is not a de Polignac number, because 21134230134497 - 2³⁶ = 21065510657761 is a prime.

It is not a weakly prime, because it can be changed into another prime (21134230134097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10567115067248 + 10567115067249.

It is an arithmetic number, because the mean of its divisors is an integer number (10567115067249).

Almost surely, 2^{21134230134497} is an apocalyptic number.

It is an amenable number.

21134230134497 is a deficient number, since it is larger than the sum of its proper divisors (1).

21134230134497 is an equidigital number, since it uses as much as digits as its factorization.

21134230134497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 44.

The spelling of 21134230134497 in words is "twenty-one trillion, one hundred thirty-four billion, two hundred thirty million, one hundred thirty-four thousand, four hundred ninety-seven".