1000221371 has 2 divisors, whose sum is σ = 1000221372. Its totient is φ = 1000221370.

The previous prime is 1000221337. The next prime is 1000221379. The reversal of 1000221371 is 1731220001.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1000221371 is a prime.

It is not a weakly prime, because it can be changed into another prime (1000221379) 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, 500110685 + 500110686.

It is an arithmetic number, because the mean of its divisors is an integer number (500110686).

Almost surely, 2^1000221371 is an apocalyptic number.

1000221371 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000221371 is an equidigital number, since it uses as much as digits as its factorization.

1000221371 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 1000221371 is about 31626.2765908350. The cubic root of 1000221371 is about 1000.0737848890.

Adding to 1000221371 its reverse (1731220001), we get a palindrome (2731441372).

The spelling of 1000221371 in words is "one billion, two hundred twenty-one thousand, three hundred seventy-one".