21222002020002 has 64 divisors (see below), whose sum is σ = 49247528162304. Its totient is φ = 5970976482240.

The previous prime is 21222002020001. The next prime is 21222002020049. The reversal of 21222002020002 is 20002020022212.

It is not an unprimeable number, because it can be changed into a prime (21222002020001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7381773 + ... + 9845535.

It is an arithmetic number, because the mean of its divisors is an integer number (769492627536).

Almost surely, 2^{21222002020002} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21222002020002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24623764081152).

21222002020002 is an abundant number, since it is smaller than the sum of its proper divisors (28025526142302).

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

21222002020002 is a wasteful number, since it uses less digits than its factorization.

21222002020002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2466903.

The product of its (nonzero) digits is 128, while the sum is 15.

Adding to 21222002020002 its reverse (20002020022212), we get a palindrome (41224022042214).

The spelling of 21222002020002 in words is "twenty-one trillion, two hundred twenty-two billion, two million, twenty thousand, two".