123421210 has 24 divisors (see below), whose sum is σ = 244192788. Its totient is φ = 44880000.

The previous prime is 123421171. The next prime is 123421211. The reversal of 123421210 is 12124321.

It can be written as a sum of positive squares in 2 ways, for example, as 108513889 + 14907321 = 10417^2 + 3861^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123421211) 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 11 ways as a sum of consecutive naturals, for example, 49791 + ... + 52210.

Almost surely, 2^123421210 is an apocalyptic number.

123421210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123421210 is a deficient number, since it is larger than the sum of its proper divisors (120771578).

123421210 is a wasteful number, since it uses less digits than its factorization.

123421210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102030 (or 102019 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 123421210 is about 11109.5098901797. The cubic root of 123421210 is about 497.8860214523.

Adding to 123421210 its reverse (12124321), we get a palindrome (135545531).

The spelling of 123421210 in words is "one hundred twenty-three million, four hundred twenty-one thousand, two hundred ten".