1020020201028 has 36 divisors (see below), whose sum is σ = 2673880118000. Its totient is φ = 340006733352.

The previous prime is 1020020201009. The next prime is 1020020201029. The reversal of 1020020201028 is 8201020200201.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 1020020201028.

It is not an unprimeable number, because it can be changed into a prime (1020020201029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 524700778 + ... + 524702721.

Almost surely, 2^{1020020201028} is an apocalyptic number.

1020020201028 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1020020201028 is an abundant number, since it is smaller than the sum of its proper divisors (1653859916972).

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

1020020201028 is a wasteful number, since it uses less digits than its factorization.

1020020201028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1049403518 (or 1049403504 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1020020201028 its reverse (8201020200201), we get a palindrome (9221040401229).

The spelling of 1020020201028 in words is "one trillion, twenty billion, twenty million, two hundred one thousand, twenty-eight".