1220101212 has 48 divisors (see below), whose sum is σ = 3107768832. Its totient is φ = 369482880.

The previous prime is 1220101189. The next prime is 1220101241. The reversal of 1220101212 is 2121010221.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 356413 + ... + 359819.

It is an arithmetic number, because the mean of its divisors is an integer number (64745184).

Almost surely, 2^1220101212 is an apocalyptic number.

1220101212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1220101212 is an abundant number, since it is smaller than the sum of its proper divisors (1887667620).

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

1220101212 is a wasteful number, since it uses less digits than its factorization.

1220101212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6138 (or 6136 counting only the distinct ones).

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

The square root of 1220101212 is about 34929.9472086632. The cubic root of 1220101212 is about 1068.5592779742.

Adding to 1220101212 its reverse (2121010221), we get a palindrome (3341111433).

Subtracting 1220101212 from its reverse (2121010221), we obtain a palindrome (900909009).

The spelling of 1220101212 in words is "one billion, two hundred twenty million, one hundred one thousand, two hundred twelve".