1222001200 has 90 divisors (see below), whose sum is σ = 3415236396. Its totient is φ = 418965120.

The previous prime is 1222001189. The next prime is 1222001203. The reversal of 1222001200 is 21002221.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (1222001203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 11574 + ... + 50773.

Almost surely, 2^1222001200 is an apocalyptic number.

1222001200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222001200 is an abundant number, since it is smaller than the sum of its proper divisors (2193235196).

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

1222001200 is a wasteful number, since it uses less digits than its factorization.

1222001200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62379 (or 62361 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 1222001200 is about 34957.1337497799. The cubic root of 1222001200 is about 1069.1136573528.

Adding to 1222001200 its reverse (21002221), we get a palindrome (1243003421).

The spelling of 1222001200 in words is "one billion, two hundred twenty-two million, one thousand, two hundred".