1047129221 has 2 divisors, whose sum is σ = 1047129222. Its totient is φ = 1047129220.

The previous prime is 1047129203. The next prime is 1047129323. The reversal of 1047129221 is 1229217401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 900840196 + 146289025 = 30014^2 + 12095^2 .

It is an emirp because it is prime and its reverse (1229217401) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1047129221 - 2¹⁰ = 1047128197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1047129521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 523564610 + 523564611.

It is an arithmetic number, because the mean of its divisors is an integer number (523564611).

Almost surely, 2^1047129221 is an apocalyptic number.

It is an amenable number.

1047129221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1047129221 is an equidigital number, since it uses as much as digits as its factorization.

1047129221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 1047129221 is about 32359.3760910188. The cubic root of 1047129221 is about 1015.4692099673.

The spelling of 1047129221 in words is "one billion, forty-seven million, one hundred twenty-nine thousand, two hundred twenty-one".