21354661010299 has 2 divisors, whose sum is σ = 21354661010300. Its totient is φ = 21354661010298.

The previous prime is 21354661010281. The next prime is 21354661010341. The reversal of 21354661010299 is 99201016645312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21354661010299 - 2⁷ = 21354661010171 is a prime.

It is not a weakly prime, because it can be changed into another prime (21354661010269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10677330505149 + 10677330505150.

It is an arithmetic number, because the mean of its divisors is an integer number (10677330505150).

Almost surely, 2^{21354661010299} is an apocalyptic number.

21354661010299 is a deficient number, since it is larger than the sum of its proper divisors (1).

21354661010299 is an equidigital number, since it uses as much as digits as its factorization.

21354661010299 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 699840, while the sum is 49.

The spelling of 21354661010299 in words is "twenty-one trillion, three hundred fifty-four billion, six hundred sixty-one million, ten thousand, two hundred ninety-nine".