1002012021988 has 6 divisors (see below), whose sum is σ = 1753521038486. Its totient is φ = 501006010992.

The previous prime is 1002012021961. The next prime is 1002012022021. The reversal of 1002012021988 is 8891202102001.

It can be written as a sum of positive squares in only one way, i.e., 616174761024 + 385837260964 = 784968^2 + 621158^2 .

It is an unprimeable number.

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, 125251502745 + ... + 125251502752.

Almost surely, 2^{1002012021988} is an apocalyptic number.

It is an amenable number.

1002012021988 is a deficient number, since it is larger than the sum of its proper divisors (751509016498).

1002012021988 is a wasteful number, since it uses less digits than its factorization.

1002012021988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250503005501 (or 250503005499 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 34.

Adding to 1002012021988 its reverse (8891202102001), we get a palindrome (9893214123989).

The spelling of 1002012021988 in words is "one trillion, two billion, twelve million, twenty-one thousand, nine hundred eighty-eight".