212124621646 has 16 divisors (see below), whose sum is σ = 364382835840. Its totient is φ = 90725395320.

The previous prime is 212124621637. The next prime is 212124621659. The reversal of 212124621646 is 646126421212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15422616 + ... + 15436363.

It is an arithmetic number, because the mean of its divisors is an integer number (22773927240).

Almost surely, 2^212124621646 is an apocalyptic number.

212124621646 is a deficient number, since it is larger than the sum of its proper divisors (152258214194).

212124621646 is a wasteful number, since it uses less digits than its factorization.

212124621646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30859479.

The product of its digits is 55296, while the sum is 37.

The spelling of 212124621646 in words is "two hundred twelve billion, one hundred twenty-four million, six hundred twenty-one thousand, six hundred forty-six".