1210221300 has 36 divisors (see below), whose sum is σ = 3501574496. Its totient is φ = 322725600.

The previous prime is 1210221293. The next prime is 1210221343. The reversal of 1210221300 is 31220121.

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

It is a congruent 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 11 ways as a sum of consecutive naturals, for example, 2016736 + ... + 2017335.

Almost surely, 2^1210221300 is an apocalyptic number.

1210221300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1210221300 is an abundant number, since it is smaller than the sum of its proper divisors (2291353196).

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

1210221300 is a wasteful number, since it uses less digits than its factorization.

1210221300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4034088 (or 4034081 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1210221300 is about 34788.2350802682. The cubic root of 1210221300 is about 1065.6671963809.

Adding to 1210221300 its reverse (31220121), we get a palindrome (1241441421).

The spelling of 1210221300 in words is "one billion, two hundred ten million, two hundred twenty-one thousand, three hundred".