1220012211 has 64 divisors (see below), whose sum is σ = 1964666880. Its totient is φ = 665159040.

The previous prime is 1220012203. The next prime is 1220012221. The reversal of 1220012211 is 1122100221.

It is not a de Polignac number, because 1220012211 - 2³ = 1220012203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1220012221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 996946 + ... + 998168.

It is an arithmetic number, because the mean of its divisors is an integer number (30697920).

Almost surely, 2^1220012211 is an apocalyptic number.

1220012211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1220012211 is a deficient number, since it is larger than the sum of its proper divisors (744654669).

1220012211 is a wasteful number, since it uses less digits than its factorization.

1220012211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1336.

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

The square root of 1220012211 is about 34928.6731926651. The cubic root of 1220012211 is about 1068.5332951142.

Adding to 1220012211 its reverse (1122100221), we get a palindrome (2342112432).

The spelling of 1220012211 in words is "one billion, two hundred twenty million, twelve thousand, two hundred eleven".