1222012200 has 48 divisors (see below), whose sum is σ = 3788239680. Its totient is φ = 325869760.

The previous prime is 1222012199. The next prime is 1222012201. The reversal of 1222012200 is 22102221.

It is an interprime number because it is at equal distance from previous prime (1222012199) and next prime (1222012201).

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

It is not an unprimeable number, because it can be changed into a prime (1222012201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1017744 + ... + 1018943.

It is an arithmetic number, because the mean of its divisors is an integer number (78921660).

Almost surely, 2^1222012200 is an apocalyptic number.

1222012200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222012200 is an abundant number, since it is smaller than the sum of its proper divisors (2566227480).

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

1222012200 is a wasteful number, since it uses less digits than its factorization.

1222012200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2036706 (or 2036697 counting only the distinct ones).

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

The square root of 1222012200 is about 34957.2910849797. The cubic root of 1222012200 is about 1069.1168652643.

Adding to 1222012200 its reverse (22102221), we get a palindrome (1244114421).

The spelling of 1222012200 in words is "one billion, two hundred twenty-two million, twelve thousand, two hundred".