210123312212 has 24 divisors (see below), whose sum is σ = 424741242240. Its totient is φ = 89892325760.

The previous prime is 210123312199. The next prime is 210123312239. The reversal of 210123312212 is 212213321012.

It is a congruent number.

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, 140456012 + ... + 140457507.

It is an arithmetic number, because the mean of its divisors is an integer number (17697551760).

Almost surely, 2^210123312212 is an apocalyptic number.

210123312212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

210123312212 is an abundant number, since it is smaller than the sum of its proper divisors (214617930028).

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

210123312212 is a wasteful number, since it uses less digits than its factorization.

210123312212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280913551 (or 280913549 counting only the distinct ones).

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

Adding to 210123312212 its reverse (212213321012), we get a palindrome (422336633224).

The spelling of 210123312212 in words is "two hundred ten billion, one hundred twenty-three million, three hundred twelve thousand, two hundred twelve".