123220210 has 16 divisors (see below), whose sum is σ = 221923800. Its totient is φ = 49259776.

The previous prime is 123220193. The next prime is 123220219. The reversal of 123220210 is 12022321.

It can be written as a sum of positive squares in 4 ways, for example, as 116834481 + 6385729 = 10809^2 + 2527^2 .

It is not an unprimeable number, because it can be changed into a prime (123220219) by changing a digit.

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, 28896 + ... + 32884.

Almost surely, 2^123220210 is an apocalyptic number.

123220210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123220210 is a deficient number, since it is larger than the sum of its proper divisors (98703590).

123220210 is a wasteful number, since it uses less digits than its factorization.

123220210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7085.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 123220210 is about 11100.4599003825. The cubic root of 123220210 is about 497.6155939574.

Adding to 123220210 its reverse (12022321), we get a palindrome (135242531).

The spelling of 123220210 in words is "one hundred twenty-three million, two hundred twenty thousand, two hundred ten".