21373577155027 has 2 divisors, whose sum is σ = 21373577155028. Its totient is φ = 21373577155026.

The previous prime is 21373577155009. The next prime is 21373577155067. The reversal of 21373577155027 is 72055177537312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21373577155027 - 2¹⁵ = 21373577122259 is a prime.

It is not a weakly prime, because it can be changed into another prime (21373577155067) 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, 10686788577513 + 10686788577514.

It is an arithmetic number, because the mean of its divisors is an integer number (10686788577514).

Almost surely, 2^{21373577155027} is an apocalyptic number.

21373577155027 is a deficient number, since it is larger than the sum of its proper divisors (1).

21373577155027 is an equidigital number, since it uses as much as digits as its factorization.

21373577155027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10804500, while the sum is 55.

The spelling of 21373577155027 in words is "twenty-one trillion, three hundred seventy-three billion, five hundred seventy-seven million, one hundred fifty-five thousand, twenty-seven".