212742687124 has 24 divisors (see below), whose sum is σ = 406226989728. Its totient is φ = 96681731040.

The previous prime is 212742687103. The next prime is 212742687161. The reversal of 212742687124 is 421786247212.

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, 265339 + ... + 704194.

It is an arithmetic number, because the mean of its divisors is an integer number (16926124572).

Almost surely, 2^212742687124 is an apocalyptic number.

It is an amenable number.

212742687124 is a deficient number, since it is larger than the sum of its proper divisors (193484302604).

212742687124 is a wasteful number, since it uses less digits than its factorization.

212742687124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 974535 (or 974533 counting only the distinct ones).

The product of its digits is 602112, while the sum is 46.

The spelling of 212742687124 in words is "two hundred twelve billion, seven hundred forty-two million, six hundred eighty-seven thousand, one hundred twenty-four".