1220212200 has 48 divisors (see below), whose sum is σ = 3782659680. Its totient is φ = 325389760.

The previous prime is 1220212183. The next prime is 1220212211. The reversal of 1220212200 is 22120221.

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

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1016244 + ... + 1017443.

It is an arithmetic number, because the mean of its divisors is an integer number (78805410).

Almost surely, 2^1220212200 is an apocalyptic number.

1220212200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220212200 is an abundant number, since it is smaller than the sum of its proper divisors (2562447480).

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

1220212200 is a wasteful number, since it uses less digits than its factorization.

1220212200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2033706 (or 2033697 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 1220212200 is about 34931.5358952337. The cubic root of 1220212200 is about 1068.5916779259.

Adding to 1220212200 its reverse (22120221), we get a palindrome (1242332421).

The spelling of 1220212200 in words is "one billion, two hundred twenty million, two hundred twelve thousand, two hundred".