1000020210128 has 20 divisors (see below), whose sum is σ = 1944533891940. Its totient is φ = 498205012224.

The previous prime is 1000020210127. The next prime is 1000020210143. The reversal of 1000020210128 is 8210120200001.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 463504979344 + 536515230784 = 680812^2 + 732472^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000020210121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112813733 + ... + 112822596.

It is an arithmetic number, because the mean of its divisors is an integer number (97226694597).

Almost surely, 2^{1000020210128} is an apocalyptic number.

It is an amenable number.

1000020210128 is a deficient number, since it is larger than the sum of its proper divisors (944513681812).

1000020210128 is a wasteful number, since it uses less digits than its factorization.

1000020210128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225636614 (or 225636608 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1000020210128 its reverse (8210120200001), we get a palindrome (9210140410129).

The spelling of 1000020210128 in words is "one trillion, twenty million, two hundred ten thousand, one hundred twenty-eight".