1220111212 has 12 divisors (see below), whose sum is σ = 2135702296. Its totient is φ = 609910560.

The previous prime is 1220111183. The next prime is 1220111219. The reversal of 1220111212 is 2121110221.

It is a junction number, because it is equal to n+sod(n) for n = 1220111192 and 1220111201.

It is not an unprimeable number, because it can be changed into a prime (1220111219) 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, 16089 + ... + 51952.

Almost surely, 2^1220111212 is an apocalyptic number.

It is an amenable number.

1220111212 is a deficient number, since it is larger than the sum of its proper divisors (915591084).

1220111212 is a wasteful number, since it uses less digits than its factorization.

1220111212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72528 (or 72526 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 1220111212 is about 34930.0903520160. The cubic root of 1220111212 is about 1068.5621972849.

Adding to 1220111212 its reverse (2121110221), we get a palindrome (3341221433).

Subtracting 1220111212 from its reverse (2121110221), we obtain a palindrome (900999009).

The spelling of 1220111212 in words is "one billion, two hundred twenty million, one hundred eleven thousand, two hundred twelve".