10001220021001 has 16 divisors (see below), whose sum is σ = 11385331458048. Its totient is φ = 8696297926800.

The previous prime is 10001220020999. The next prime is 10001220021029. The reversal of 10001220021001 is 10012002210001.

It is not a de Polignac number, because 10001220021001 - 2¹ = 10001220020999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10001220021061) 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 15 ways as a sum of consecutive naturals, for example, 4427416 + ... + 6293206.

It is an arithmetic number, because the mean of its divisors is an integer number (711583216128).

Almost surely, 2^{10001220021001} is an apocalyptic number.

10001220021001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10001220021001 is a deficient number, since it is larger than the sum of its proper divisors (1384111437047).

10001220021001 is a wasteful number, since it uses less digits than its factorization.

10001220021001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1887012.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 10001220021001 its reverse (10012002210001), we get a palindrome (20013222231002).

The spelling of 10001220021001 in words is "ten trillion, one billion, two hundred twenty million, twenty-one thousand, one".