21222002201000 has 128 divisors (see below), whose sum is σ = 49851020419200. Its totient is φ = 8456093107200.

The previous prime is 21222002200943. The next prime is 21222002201003. The reversal of 21222002201000 is 10220022212.

It is not an unprimeable number, because it can be changed into a prime (21222002201003) 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, 536309216 + ... + 536348784.

It is an arithmetic number, because the mean of its divisors is an integer number (389461097025).

Almost surely, 2^{21222002201000} is an apocalyptic number.

21222002201000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21222002201000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24925510209600).

21222002201000 is an abundant number, since it is smaller than the sum of its proper divisors (28629018218200).

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

21222002201000 is a wasteful number, since it uses less digits than its factorization.

21222002201000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41644 (or 41630 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 21222002201000 its reverse (10220022212), we get a palindrome (21232222223212).

The spelling of 21222002201000 in words is "twenty-one trillion, two hundred twenty-two billion, two million, two hundred one thousand".