1020020001002 has 8 divisors (see below), whose sum is σ = 1530679151556. Its totient is φ = 509793617152.

The previous prime is 1020020000999. The next prime is 1020020001043. The reversal of 1020020001002 is 2001000200201.

It can be written as a sum of positive squares in 2 ways, for example, as 768867676201 + 251152324801 = 876851^2 + 501151^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108185783 + ... + 108195210.

Almost surely, 2^{1020020001002} is an apocalyptic number.

1020020001002 is a deficient number, since it is larger than the sum of its proper divisors (510659150554).

1020020001002 is a wasteful number, since it uses less digits than its factorization.

1020020001002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216383352.

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

Adding to 1020020001002 its reverse (2001000200201), we get a palindrome (3021020201203).

The spelling of 1020020001002 in words is "one trillion, twenty billion, twenty million, one thousand, two".