1000021229 has 2 divisors, whose sum is σ = 1000021230. Its totient is φ = 1000021228.

The previous prime is 1000021193. The next prime is 1000021247. The reversal of 1000021229 is 9221200001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 992376004 + 7645225 = 31502^2 + 2765^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1000021229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1000021259) 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, 500010614 + 500010615.

It is an arithmetic number, because the mean of its divisors is an integer number (500010615).

Almost surely, 2^1000021229 is an apocalyptic number.

It is an amenable number.

1000021229 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000021229 is an equidigital number, since it uses as much as digits as its factorization.

1000021229 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 17.

The square root of 1000021229 is about 31623.1122598646. The cubic root of 1000021229 is about 1000.0070762833.

The spelling of 1000021229 in words is "one billion, twenty-one thousand, two hundred twenty-nine".