1021021002002 has 8 divisors (see below), whose sum is σ = 1533049376700. Its totient is φ = 510004543104.

The previous prime is 1021021001977. The next prime is 1021021002041. The reversal of 1021021002002 is 2002001201201.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 981702474481 + 39318527521 = 990809^2 + 198289^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 252976427 + ... + 252980462.

Almost surely, 2^{1021021002002} is an apocalyptic number.

1021021002002 is a deficient number, since it is larger than the sum of its proper divisors (512028374698).

1021021002002 is a wasteful number, since it uses less digits than its factorization.

1021021002002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505957900.

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

Adding to 1021021002002 its reverse (2002001201201), we get a palindrome (3023022203203).

The spelling of 1021021002002 in words is "one trillion, twenty-one billion, twenty-one million, two thousand, two".