123212213210 has 16 divisors (see below), whose sum is σ = 224273917800. Its totient is φ = 48731122176.

The previous prime is 123212213191. The next prime is 123212213221. The reversal of 123212213210 is 12312212321.

It can be written as a sum of positive squares in 4 ways, for example, as 112210930441 + 11001282769 = 334979^2 + 104887^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69219455 + ... + 69221234.

Almost surely, 2^123212213210 is an apocalyptic number.

123212213210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123212213210 is a deficient number, since it is larger than the sum of its proper divisors (101061704590).

123212213210 is a wasteful number, since it uses less digits than its factorization.

123212213210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138440785.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 123212213210 its reverse (12312212321), we get a palindrome (135524425531).

The spelling of 123212213210 in words is "one hundred twenty-three billion, two hundred twelve million, two hundred thirteen thousand, two hundred ten".