21040120324229 has 2 divisors, whose sum is σ = 21040120324230. Its totient is φ = 21040120324228.

The previous prime is 21040120324193. The next prime is 21040120324243. The reversal of 21040120324229 is 92242302104012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15951157332100 + 5088962992129 = 3993890^2 + 2255873^2 .

It is a cyclic number.

It is not a de Polignac number, because 21040120324229 - 2³² = 21035825356933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21040120324195 and 21040120324204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21040120327229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10520060162114 + 10520060162115.

It is an arithmetic number, because the mean of its divisors is an integer number (10520060162115).

Almost surely, 2^{21040120324229} is an apocalyptic number.

It is an amenable number.

21040120324229 is a deficient number, since it is larger than the sum of its proper divisors (1).

21040120324229 is an equidigital number, since it uses as much as digits as its factorization.

21040120324229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 32.

The spelling of 21040120324229 in words is "twenty-one trillion, forty billion, one hundred twenty million, three hundred twenty-four thousand, two hundred twenty-nine".