21002022012012 has 12 divisors (see below), whose sum is σ = 49004718028056. Its totient is φ = 7000674004000.

The previous prime is 21002022012011. The next prime is 21002022012031. The reversal of 21002022012012 is 21021022020012.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 21002022011982 and 21002022012000.

It is not an unprimeable number, because it can be changed into a prime (21002022012011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 875084250489 + ... + 875084250512.

It is an arithmetic number, because the mean of its divisors is an integer number (4083726502338).

Almost surely, 2^{21002022012012} is an apocalyptic number.

It is an amenable number.

21002022012012 is an abundant number, since it is smaller than the sum of its proper divisors (28002696016044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21002022012012 is a wasteful number, since it uses less digits than its factorization.

21002022012012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1750168501008 (or 1750168501006 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21002022012012 its reverse (21021022020012), we get a palindrome (42023044032024).

The spelling of 21002022012012 in words is "twenty-one trillion, two billion, twenty-two million, twelve thousand, twelve".