1000221021002 has 24 divisors (see below), whose sum is σ = 1754142959844. Its totient is φ = 426490173312.

The previous prime is 1000221020927. The next prime is 1000221021077. The reversal of 1000221021002 is 2001201220001.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1000221020927) and next prime (1000221021077).

It can be written as a sum of positive squares in 2 ways, for example, as 822719747521 + 177501273481 = 907039^2 + 421309^2 .

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 25885103 + ... + 25923714.

Almost surely, 2^{1000221021002} is an apocalyptic number.

1000221021002 is a deficient number, since it is larger than the sum of its proper divisors (753921938842).

1000221021002 is a wasteful number, since it uses less digits than its factorization.

1000221021002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51809030 (or 51809023 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1000221021002 its reverse (2001201220001), we get a palindrome (3001422241003).

The spelling of 1000221021002 in words is "one trillion, two hundred twenty-one million, twenty-one thousand, two".