1213123210 has 64 divisors (see below), whose sum is σ = 2507097600. Its totient is φ = 418908672.

The previous prime is 1213123207. The next prime is 1213123259. The reversal of 1213123210 is 123213121.

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 31 ways as a sum of consecutive naturals, for example, 192022 + ... + 198238.

It is an arithmetic number, because the mean of its divisors is an integer number (39173400).

Almost surely, 2^1213123210 is an apocalyptic number.

1213123210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1213123210 is an abundant number, since it is smaller than the sum of its proper divisors (1293974390).

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

1213123210 is a wasteful number, since it uses less digits than its factorization.

1213123210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6335.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1213123210 is about 34829.9183174466. The cubic root of 1213123210 is about 1066.5182808996.

Adding to 1213123210 its reverse (123213121), we get a palindrome (1336336331).

The spelling of 1213123210 in words is "one billion, two hundred thirteen million, one hundred twenty-three thousand, two hundred ten".