221001110129 has 2 divisors, whose sum is σ = 221001110130. Its totient is φ = 221001110128.

The previous prime is 221001110119. The next prime is 221001110179. The reversal of 221001110129 is 921011100122.

221001110129 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 159099670129 + 61901440000 = 398873^2 + 248800^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221001110129 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221001110129.

It is not a weakly prime, because it can be changed into another prime (221001110119) 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, 110500555064 + 110500555065.

It is an arithmetic number, because the mean of its divisors is an integer number (110500555065).

Almost surely, 2^221001110129 is an apocalyptic number.

It is an amenable number.

221001110129 is a deficient number, since it is larger than the sum of its proper divisors (1).

221001110129 is an equidigital number, since it uses as much as digits as its factorization.

221001110129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 221001110129 in words is "two hundred twenty-one billion, one million, one hundred ten thousand, one hundred twenty-nine".