21222222121202 has 16 divisors (see below), whose sum is σ = 31892632016832. Its totient is φ = 10591345345680.

The previous prime is 21222222121181. The next prime is 21222222121211. The reversal of 21222222121202 is 20212122222212.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138773393 + ... + 138926235.

It is an arithmetic number, because the mean of its divisors is an integer number (1993289501052).

Almost surely, 2^{21222222121202} is an apocalyptic number.

21222222121202 is a deficient number, since it is larger than the sum of its proper divisors (10670409895630).

21222222121202 is a wasteful number, since it uses less digits than its factorization.

21222222121202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281713.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 21222222121202 its reverse (20212122222212), we get a palindrome (41434344343414).

It can be divided in two parts, 2122222 and 2121202, that added together give a palindrome (4243424).

The spelling of 21222222121202 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred twenty-two million, one hundred twenty-one thousand, two hundred two".