21222122100002 has 16 divisors (see below), whose sum is σ = 32511819795840. Its totient is φ = 10384867374768.

The previous prime is 21222122099951. The next prime is 21222122100007. The reversal of 21222122100002 is 20000122122212.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21222122100007) 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, 2327393 + ... + 6918164.

It is an arithmetic number, because the mean of its divisors is an integer number (2031988737240).

Almost surely, 2^{21222122100002} is an apocalyptic number.

21222122100002 is a deficient number, since it is larger than the sum of its proper divisors (11289697695838).

21222122100002 is a wasteful number, since it uses less digits than its factorization.

21222122100002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9270025.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21222122100002 its reverse (20000122122212), we get a palindrome (41222244222214).

The spelling of 21222122100002 in words is "twenty-one trillion, two hundred twenty-two billion, one hundred twenty-two million, one hundred thousand, two".