1213225210 has 16 divisors (see below), whose sum is σ = 2190069000. Its totient is φ = 483898176.

The previous prime is 1213225163. The next prime is 1213225261. The reversal of 1213225210 is 125223121.

It can be written as a sum of positive squares in 4 ways, for example, as 721405881 + 491819329 = 26859^2 + 22177^2 .

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 7 ways as a sum of consecutive naturals, for example, 170325 + ... + 177304.

Almost surely, 2^1213225210 is an apocalyptic number.

1213225210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1213225210 is a deficient number, since it is larger than the sum of its proper divisors (976843790).

1213225210 is a wasteful number, since it uses less digits than its factorization.

1213225210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347985.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1213225210 is about 34831.3825450555. The cubic root of 1213225210 is about 1066.5481711902.

Adding to 1213225210 its reverse (125223121), we get a palindrome (1338448331).

The spelling of 1213225210 in words is "one billion, two hundred thirteen million, two hundred twenty-five thousand, two hundred ten".