21122220210222 has 16 divisors (see below), whose sum is σ = 44467832021760. Its totient is φ = 6670174803192.

The previous prime is 21122220210191. The next prime is 21122220210227. The reversal of 21122220210222 is 22201202222112.

It is a super-2 number, since 2×21122220210222² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122220210227) 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, 92641316598 + ... + 92641316825.

It is an arithmetic number, because the mean of its divisors is an integer number (2779239501360).

Almost surely, 2^{21122220210222} is an apocalyptic number.

21122220210222 is an abundant number, since it is smaller than the sum of its proper divisors (23345611811538).

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

21122220210222 is a wasteful number, since it uses less digits than its factorization.

21122220210222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185282633447.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 21122220210222 its reverse (22201202222112), we get a palindrome (43323422432334).

The spelling of 21122220210222 in words is "twenty-one trillion, one hundred twenty-two billion, two hundred twenty million, two hundred ten thousand, two hundred twenty-two".