1212220220112 has 120 divisors (see below), whose sum is σ = 3791212221888. Its totient is φ = 358379942400.

The previous prime is 1212220220059. The next prime is 1212220220147. The reversal of 1212220220112 is 2110220222121.

It is a happy number.

1212220220112 is a `hidden beast` number, since 1 + 212 + 220 + 220 + 1 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9267868 + ... + 9397755.

Almost surely, 2^{1212220220112} is an apocalyptic number.

1212220220112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1212220220112 is an abundant number, since it is smaller than the sum of its proper divisors (2578992001776).

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

1212220220112 is a wasteful number, since it uses less digits than its factorization.

1212220220112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18665689 (or 18665680 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1212220220112 its reverse (2110220222121), we get a palindrome (3322440442233).

The spelling of 1212220220112 in words is "one trillion, two hundred twelve billion, two hundred twenty million, two hundred twenty thousand, one hundred twelve".