20021022000021 has 8 divisors (see below), whose sum is σ = 30508224000064. Its totient is φ = 11440584000000.

The previous prime is 20021022000017. The next prime is 20021022000059. The reversal of 20021022000021 is 12000022012002.

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

It is not a de Polignac number, because 20021022000021 - 2² = 20021022000017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20021021999970 and 20021022000006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021022000521) 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, 476690999980 + ... + 476691000021.

It is an arithmetic number, because the mean of its divisors is an integer number (3813528000008).

Almost surely, 2^{20021022000021} is an apocalyptic number.

20021022000021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20021022000021 is a deficient number, since it is larger than the sum of its proper divisors (10487202000043).

20021022000021 is an equidigital number, since it uses as much as digits as its factorization.

20021022000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 953382000011.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 20021022000021 its reverse (12000022012002), we get a palindrome (32021044012023).

The spelling of 20021022000021 in words is "twenty trillion, twenty-one billion, twenty-two million, twenty-one", and thus it is an aban number and an uban number.