10001001101021 has 32 divisors (see below), whose sum is σ = 12711859089408. Its totient is φ = 7666142457600.

The previous prime is 10001001101017. The next prime is 10001001101041. The reversal of 10001001101021 is 12010110010001.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 10001001101021 - 2² = 10001001101017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10001001101041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11686055 + ... + 12512628.

It is an arithmetic number, because the mean of its divisors is an integer number (397245596544).

Almost surely, 2^{10001001101021} is an apocalyptic number.

It is an amenable number.

10001001101021 is a deficient number, since it is larger than the sum of its proper divisors (2710857988387).

10001001101021 is a wasteful number, since it uses less digits than its factorization.

10001001101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24198881.

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 10001001101021 its reverse (12010110010001), we get a palindrome (22011111111022).

The spelling of 10001001101021 in words is "ten trillion, one billion, one million, one hundred one thousand, twenty-one".