1210220000 has 120 divisors (see below), whose sum is σ = 3248578872. Its totient is φ = 440000000.

The previous prime is 1210219973. The next prime is 1210220017. The reversal of 1210220000 is 220121.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a self number, because there is not a number n which added to its sum of digits gives 1210220000.

It is a congruent number.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 217250 + ... + 222750.

Almost surely, 2^1210220000 is an apocalyptic number.

1210220000 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 1210220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1624289436).

1210220000 is an abundant number, since it is smaller than the sum of its proper divisors (2038358872).

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

1210220000 is an equidigital number, since it uses as much as digits as its factorization.

1210220000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5542 (or 5519 counting only the distinct ones).

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

The square root of 1210220000 is about 34788.2163957855. The cubic root of 1210220000 is about 1065.6668148067. Note that the first 3 decimals are identical.

Adding to 1210220000 its reverse (220121), we get a palindrome (1210440121).

The spelling of 1210220000 in words is "one billion, two hundred ten million, two hundred twenty thousand".