21021222022002 has 96 divisors (see below), whose sum is σ = 47186548081920. Its totient is φ = 6759657792000.

The previous prime is 21021222021967. The next prime is 21021222022007. The reversal of 21021222022002 is 20022022212012.

21021222022002 is a `hidden beast` number, since 2 + 10 + 212 + 220 + 220 + 0 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (21021222022007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 27544602 + ... + 28297482.

It is an arithmetic number, because the mean of its divisors is an integer number (491526542520).

Almost surely, 2^{21021222022002} is an apocalyptic number.

21021222022002 is an abundant number, since it is smaller than the sum of its proper divisors (26165326059918).

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

21021222022002 is a wasteful number, since it uses less digits than its factorization.

21021222022002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 753440 (or 753437 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 21021222022002 its reverse (20022022212012), we get a palindrome (41043244234014).

It can be divided in two parts, 210 and 21222022002, that added together give a palindrome (21222022212).

The spelling of 21021222022002 in words is "twenty-one trillion, twenty-one billion, two hundred twenty-two million, twenty-two thousand, two".