212704494128 has 80 divisors (see below), whose sum is σ = 479772673536. Its totient is φ = 89474595840.

The previous prime is 212704494127. The next prime is 212704494133. The reversal of 212704494128 is 821494407212.

It is not an unprimeable number, because it can be changed into a prime (212704494127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1221983 + ... + 1385153.

Almost surely, 2^212704494128 is an apocalyptic number.

212704494128 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212704494128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (239886336768).

212704494128 is an abundant number, since it is smaller than the sum of its proper divisors (267068179408).

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

212704494128 is a wasteful number, since it uses less digits than its factorization.

212704494128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163402 (or 163396 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 44.

The spelling of 212704494128 in words is "two hundred twelve billion, seven hundred four million, four hundred ninety-four thousand, one hundred twenty-eight".