1020021010200 has 72 divisors (see below), whose sum is σ = 3425570565300. Its totient is φ = 272005602240.

The previous prime is 1020021010199. The next prime is 1020021010201. The reversal of 1020021010200 is 20101200201.

It is an interprime number because it is at equal distance from previous prime (1020021010199) and next prime (1020021010201).

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×1020021010200² (a number of 25 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020021010201) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 283337370 + ... + 283340969.

Almost surely, 2^{1020021010200} is an apocalyptic number.

1020021010200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020021010200 is an abundant number, since it is smaller than the sum of its proper divisors (2405549555100).

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

1020021010200 is a wasteful number, since it uses less digits than its factorization.

1020021010200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566678361 (or 566678349 counting only the distinct ones).

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

Adding to 1020021010200 its reverse (20101200201), we get a palindrome (1040122210401).

The spelling of 1020021010200 in words is "one trillion, twenty billion, twenty-one million, ten thousand, two hundred".