1212220112 has 20 divisors (see below), whose sum is σ = 2365577760. Its totient is φ = 601748448.

The previous prime is 1212220111. The next prime is 1212220117. The reversal of 1212220112 is 2110222121.

It is a super-3 number, since 3×1212220112³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212220111) 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, 270308 + ... + 274755.

It is an arithmetic number, because the mean of its divisors is an integer number (118278888).

Almost surely, 2^1212220112 is an apocalyptic number.

It is an amenable number.

1212220112 is a deficient number, since it is larger than the sum of its proper divisors (1153357648).

1212220112 is a wasteful number, since it uses less digits than its factorization.

1212220112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545210 (or 545204 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 1212220112 is about 34816.9515035421. The cubic root of 1212220112 is about 1066.2535620798.

Adding to 1212220112 its reverse (2110222121), we get a palindrome (3322442233).

The spelling of 1212220112 in words is "one billion, two hundred twelve million, two hundred twenty thousand, one hundred twelve".