212420123616 has 24 divisors (see below), whose sum is σ = 557602824744. Its totient is φ = 70806707840.

The previous prime is 212420123567. The next prime is 212420123623. The reversal of 212420123616 is 616321024212.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1106354715 + ... + 1106354906.

It is an arithmetic number, because the mean of its divisors is an integer number (23233451031).

Almost surely, 2^212420123616 is an apocalyptic number.

It is an amenable number.

212420123616 is an abundant number, since it is smaller than the sum of its proper divisors (345182701128).

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

212420123616 is a wasteful number, since it uses less digits than its factorization.

212420123616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2212709634 (or 2212709626 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

Adding to 212420123616 its reverse (616321024212), we get a palindrome (828741147828).

The spelling of 212420123616 in words is "two hundred twelve billion, four hundred twenty million, one hundred twenty-three thousand, six hundred sixteen".