21161014512229 has 2 divisors, whose sum is σ = 21161014512230. Its totient is φ = 21161014512228.

The previous prime is 21161014512203. The next prime is 21161014512259. The reversal of 21161014512229 is 92221541016112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20084604112225 + 1076410400004 = 4481585^2 + 1037502^2 .

It is a cyclic number.

It is not a de Polignac number, because 21161014512229 - 2⁷ = 21161014512101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21161014512259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10580507256114 + 10580507256115.

It is an arithmetic number, because the mean of its divisors is an integer number (10580507256115).

Almost surely, 2^{21161014512229} is an apocalyptic number.

It is an amenable number.

21161014512229 is a deficient number, since it is larger than the sum of its proper divisors (1).

21161014512229 is an equidigital number, since it uses as much as digits as its factorization.

21161014512229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 37.

The spelling of 21161014512229 in words is "twenty-one trillion, one hundred sixty-one billion, fourteen million, five hundred twelve thousand, two hundred twenty-nine".