10001220002021 has 8 divisors (see below), whose sum is σ = 10014542956800. Its totient is φ = 9987905901280.

The previous prime is 10001220002009. The next prime is 10001220002023. The reversal of 10001220002021 is 12020002210001.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10001220002021 - 2¹⁰ = 10001220000997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10001220001993 and 10001220002011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10001220002023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48665 + ... + 4472673.

It is an arithmetic number, because the mean of its divisors is an integer number (1251817869600).

Almost surely, 2^{10001220002021} is an apocalyptic number.

It is an amenable number.

10001220002021 is a deficient number, since it is larger than the sum of its proper divisors (13322954779).

10001220002021 is a wasteful number, since it uses less digits than its factorization.

10001220002021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4427019.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 10001220002021 its reverse (12020002210001), we get a palindrome (22021222212022).

The spelling of 10001220002021 in words is "ten trillion, one billion, two hundred twenty million, two thousand, twenty-one".