1222000000 has 224 divisors, whose sum is σ = 3346832160. Its totient is φ = 441600000.

The previous prime is 1221999997. The next prime is 1222000009. The reversal of 1222000000 is 2221.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222000009) by changing a digit.

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 27 ways as a sum of consecutive naturals, for example, 25999977 + ... + 26000023.

It is an arithmetic number, because the mean of its divisors is an integer number (14941215).

Almost surely, 2^1222000000 is an apocalyptic number.

1222000000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1222000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1673416080).

1222000000 is an abundant number, since it is smaller than the sum of its proper divisors (2124832160).

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

1222000000 is an frugal number, since it uses more digits than its factorization.

1222000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104 (or 67 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 1222000000 is about 34957.1165858971. The cubic root of 1222000000 is about 1069.1133073977.

Adding to 1222000000 its reverse (2221), we get a palindrome (1222002221).

The spelling of 1222000000 in words is "one billion, two hundred twenty-two million", and thus it is an aban number.