212213122112 has 28 divisors (see below), whose sum is σ = 421638884940. Its totient is φ = 105973403136.

The previous prime is 212213122111. The next prime is 212213122133. The reversal of 212213122112 is 211221312212.

It can be written as a sum of positive squares in 2 ways, for example, as 106030989376 + 106182132736 = 325624^2 + 325856^2 .

It is not an unprimeable number, because it can be changed into a prime (212213122111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2029187 + ... + 2131202.

It is an arithmetic number, because the mean of its divisors is an integer number (15058531605).

Almost surely, 2^212213122112 is an apocalyptic number.

It is an amenable number.

212213122112 is a deficient number, since it is larger than the sum of its proper divisors (209425762828).

212213122112 is an equidigital number, since it uses as much as digits as its factorization.

212213122112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4161198 (or 4161188 counting only the distinct ones).

The product of its digits is 192, while the sum is 20.

Adding to 212213122112 its reverse (211221312212), we get a palindrome (423434434324).

The spelling of 212213122112 in words is "two hundred twelve billion, two hundred thirteen million, one hundred twenty-two thousand, one hundred twelve".