1021020002002 has 96 divisors (see below), whose sum is σ = 2093538061440. Its totient is φ = 367112632320.

The previous prime is 1021020001997. The next prime is 1021020002003. The reversal of 1021020002002 is 2002000201201.

It is a self number, because there is not a number n which added to its sum of digits gives 1021020002002.

It is not an unprimeable number, because it can be changed into a prime (1021020002003) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 100321138 + ... + 100331314.

It is an arithmetic number, because the mean of its divisors is an integer number (21807688140).

Almost surely, 2^{1021020002002} is an apocalyptic number.

1021020002002 is an abundant number, since it is smaller than the sum of its proper divisors (1072518059438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1021020002002 is a wasteful number, since it uses less digits than its factorization.

1021020002002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17376 (or 17369 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 1021020002002 its reverse (2002000201201), we get a palindrome (3023020203203).

It can be divided in two parts, 10 and 21020002002, that added together give a palindrome (21020002012).

The spelling of 1021020002002 in words is "one trillion, twenty-one billion, twenty million, two thousand, two".