212144220222 has 64 divisors (see below), whose sum is σ = 470740370688. Its totient is φ = 63192960000.

The previous prime is 212144220217. The next prime is 212144220229. The reversal of 212144220222 is 222022441212.

It is a junction number, because it is equal to n+sod(n) for n = 212144220192 and 212144220201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212144220229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6816597 + ... + 6847647.

It is an arithmetic number, because the mean of its divisors is an integer number (7355318292).

Almost surely, 2^212144220222 is an apocalyptic number.

212144220222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 212144220222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (235370185344).

212144220222 is an abundant number, since it is smaller than the sum of its proper divisors (258596150466).

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

212144220222 is a wasteful number, since it uses less digits than its factorization.

212144220222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32825.

The product of its (nonzero) digits is 2048, while the sum is 24.

Adding to 212144220222 its reverse (222022441212), we get a palindrome (434166661434).

The spelling of 212144220222 in words is "two hundred twelve billion, one hundred forty-four million, two hundred twenty thousand, two hundred twenty-two".