20021011001 has 8 divisors (see below), whose sum is σ = 20745943680. Its totient is φ = 19307866032.

The previous prime is 20021010983. The next prime is 20021011007. The reversal of 20021011001 is 10011012002.

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 20021011001 - 2⁶ = 20021010937 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20021011001.

It is not an unprimeable number, because it can be changed into a prime (20021011007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2943470 + ... + 2950263.

It is an arithmetic number, because the mean of its divisors is an integer number (2593242960).

Almost surely, 2^20021011001 is an apocalyptic number.

It is an amenable number.

20021011001 is a deficient number, since it is larger than the sum of its proper divisors (724932679).

20021011001 is an equidigital number, since it uses as much as digits as its factorization.

20021011001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5893855.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 20021011001 its reverse (10011012002), we get a palindrome (30032023003).

The spelling of 20021011001 in words is "twenty billion, twenty-one million, eleven thousand, one".