20012220000021 has 8 divisors (see below), whose sum is σ = 26682981285184. Its totient is φ = 13341469357440.

The previous prime is 20012220000011. The next prime is 20012220000037. The reversal of 20012220000021 is 12000002221002.

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

It is not a de Polignac number, because 20012220000021 - 2³⁰ = 20011146258197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20012219999961 and 20012220000006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012220000011) 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, 4415205 + ... + 7714821.

It is an arithmetic number, because the mean of its divisors is an integer number (3335372660648).

Almost surely, 2^{20012220000021} is an apocalyptic number.

It is an amenable number.

20012220000021 is a deficient number, since it is larger than the sum of its proper divisors (6670761285163).

20012220000021 is a wasteful number, since it uses less digits than its factorization.

20012220000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5321291.

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

Adding to 20012220000021 its reverse (12000002221002), we get a palindrome (32012222221023).

The spelling of 20012220000021 in words is "twenty trillion, twelve billion, two hundred twenty million, twenty-one", and thus it is an aban number.