212921042368 has 56 divisors (see below), whose sum is σ = 432583401024. Its totient is φ = 103934976000.

The previous prime is 212921042353. The next prime is 212921042381. The reversal of 212921042368 is 863240129212.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 212921042368.

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, 1117948 + ... + 1294468.

Almost surely, 2^212921042368 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212921042368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (216291700512).

212921042368 is an abundant number, since it is smaller than the sum of its proper divisors (219662358656).

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

212921042368 is a wasteful number, since it uses less digits than its factorization.

212921042368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176981 (or 176971 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 40.

The spelling of 212921042368 in words is "two hundred twelve billion, nine hundred twenty-one million, forty-two thousand, three hundred sixty-eight".