1210223820 has 96 divisors (see below), whose sum is σ = 3734260992. Its totient is φ = 290965248.

The previous prime is 1210223797. The next prime is 1210223851. The reversal of 1210223820 is 283220121.

It is a happy number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 15499 + ... + 51581.

It is an arithmetic number, because the mean of its divisors is an integer number (38898552).

Almost surely, 2^1210223820 is an apocalyptic number.

1210223820 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 1210223820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1867130496).

1210223820 is an abundant number, since it is smaller than the sum of its proper divisors (2524037172).

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

1210223820 is a wasteful number, since it uses less digits than its factorization.

1210223820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36151 (or 36149 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 1210223820 is about 34788.2712993905. The cubic root of 1210223820 is about 1065.6679360472.

Adding to 1210223820 its reverse (283220121), we get a palindrome (1493443941).

The spelling of 1210223820 in words is "one billion, two hundred ten million, two hundred twenty-three thousand, eight hundred twenty".