212111124330 has 128 divisors (see below), whose sum is σ = 598502757888. Its totient is φ = 47094193152.

The previous prime is 212111124319. The next prime is 212111124347. The reversal of 212111124330 is 33421111212.

It is a super-2 number, since 2×212111124330² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 212111124297 and 212111124306.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4740744 + ... + 4785276.

It is an arithmetic number, because the mean of its divisors is an integer number (4675802796).

Almost surely, 2^212111124330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212111124330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (299251378944).

212111124330 is an abundant number, since it is smaller than the sum of its proper divisors (386391633558).

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

212111124330 is a wasteful number, since it uses less digits than its factorization.

212111124330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45200.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 212111124330 its reverse (33421111212), we get a palindrome (245532235542).

The spelling of 212111124330 in words is "two hundred twelve billion, one hundred eleven million, one hundred twenty-four thousand, three hundred thirty".