20021200101001 has 8 divisors (see below), whose sum is σ = 21894710940000. Its totient is φ = 18156589551840.

The previous prime is 20021200100971. The next prime is 20021200101011. The reversal of 20021200101001 is 10010100212002.

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 20021200101001 - 2⁵ = 20021200100969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20021200101011) 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, 2225067751 + ... + 2225076748.

It is an arithmetic number, because the mean of its divisors is an integer number (2736838867500).

Almost surely, 2^{20021200101001} is an apocalyptic number.

It is an amenable number.

20021200101001 is a deficient number, since it is larger than the sum of its proper divisors (1873510838999).

20021200101001 is a wasteful number, since it uses less digits than its factorization.

20021200101001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4450144919.

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

Adding to 20021200101001 its reverse (10010100212002), we get a palindrome (30031300313003).

The spelling of 20021200101001 in words is "twenty trillion, twenty-one billion, two hundred million, one hundred one thousand, one".