1021020100002 has 72 divisors (see below), whose sum is σ = 2573563792176. Its totient is φ = 291700032624.

The previous prime is 1021020099989. The next prime is 1021020100021. The reversal of 1021020100002 is 2000010201201.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 16963453 + ... + 17023535.

It is an arithmetic number, because the mean of its divisors is an integer number (35743941558).

Almost surely, 2^{1021020100002} is an apocalyptic number.

1021020100002 is an abundant number, since it is smaller than the sum of its proper divisors (1552543692174).

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

1021020100002 is a wasteful number, since it uses less digits than its factorization.

1021020100002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79372 (or 79362 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 1021020100002 its reverse (2000010201201), we get a palindrome (3021030301203).

The spelling of 1021020100002 in words is "one trillion, twenty-one billion, twenty million, one hundred thousand, two".