220111212 has 12 divisors (see below), whose sum is σ = 513592856. Its totient is φ = 73370400.

The previous prime is 220111211. The next prime is 220111217. The reversal of 220111212 is 212111022.

220111212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Harshad number since it is a multiple of its sum of digits (12), and also a Moran number because the ratio is a prime number: 18342601 = 220111212 / (2 + 2 + 0 + 1 + 1 + 1 + 2 + 1 + 2).

It is not an unprimeable number, because it can be changed into a prime (220111211) 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, 9171289 + ... + 9171312.

Almost surely, 2^220111212 is an apocalyptic number.

It is an amenable number.

220111212 is an abundant number, since it is smaller than the sum of its proper divisors (293481644).

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

220111212 is a wasteful number, since it uses less digits than its factorization.

220111212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18342608 (or 18342606 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 220111212 is about 14836.1454562834. The cubic root of 220111212 is about 603.7827786344.

Adding to 220111212 its reverse (212111022), we get a palindrome (432222234).

The spelling of 220111212 in words is "two hundred twenty million, one hundred eleven thousand, two hundred twelve".