212022112221 has 10 divisors (see below), whose sum is σ = 316724389982. Its totient is φ = 141348074760.

The previous prime is 212022112219. The next prime is 212022112229. The reversal of 212022112221 is 122211220212.

It is a happy number.

212022112221 is a `hidden beast` number, since 212 + 0 + 221 + 12 + 221 = 666.

It can be written as a sum of positive squares in only one way, i.e., 210433212900 + 1588899321 = 458730^2 + 39861^2 .

It is not a de Polignac number, because 212022112221 - 2¹ = 212022112219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212022112194 and 212022112203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212022112229) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1308778390 + ... + 1308778551.

Almost surely, 2^212022112221 is an apocalyptic number.

It is an amenable number.

212022112221 is a deficient number, since it is larger than the sum of its proper divisors (104702277761).

212022112221 is an equidigital number, since it uses as much as digits as its factorization.

212022112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2617556953 (or 2617556944 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 212022112221 its reverse (122211220212), we get a palindrome (334233332433).

The spelling of 212022112221 in words is "two hundred twelve billion, twenty-two million, one hundred twelve thousand, two hundred twenty-one".