1220212112 has 30 divisors (see below), whose sum is σ = 2750148198. Its totient is φ = 522947712.

The previous prime is 1220212109. The next prime is 1220212121. The reversal of 1220212112 is 2112120221.

It can be written as a sum of positive squares in only one way, i.e., 734626816 + 485585296 = 27104^2 + 22036^2 .

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 777413 + ... + 778980.

Almost surely, 2^1220212112 is an apocalyptic number.

It is an amenable number.

1220212112 is an abundant number, since it is smaller than the sum of its proper divisors (1529936086).

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

1220212112 is a wasteful number, since it uses less digits than its factorization.

1220212112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1556415 (or 1556402 counting only the distinct ones).

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

The square root of 1220212112 is about 34931.5346356269. The cubic root of 1220212112 is about 1068.5916522375.

Adding to 1220212112 its reverse (2112120221), we get a palindrome (3332332333).

The spelling of 1220212112 in words is "one billion, two hundred twenty million, two hundred twelve thousand, one hundred twelve".