1001230021028 has 6 divisors (see below), whose sum is σ = 1752152536806. Its totient is φ = 500615010512.

The previous prime is 1001230021021. The next prime is 1001230021039. The reversal of 1001230021028 is 8201200321001.

It can be written as a sum of positive squares in only one way, i.e., 1001184350464 + 45670564 = 1000592^2 + 6758^2 .

It is not an unprimeable number, because it can be changed into a prime (1001230021021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125153752625 + ... + 125153752632.

It is an arithmetic number, because the mean of its divisors is an integer number (292025422801).

Almost surely, 2^{1001230021028} is an apocalyptic number.

It is an amenable number.

1001230021028 is a deficient number, since it is larger than the sum of its proper divisors (750922515778).

1001230021028 is a wasteful number, since it uses less digits than its factorization.

1001230021028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250307505261 (or 250307505259 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 1001230021028 its reverse (8201200321001), we get a palindrome (9202430342029).

The spelling of 1001230021028 in words is "one trillion, one billion, two hundred thirty million, twenty-one thousand, twenty-eight".