212012128 has 12 divisors (see below), whose sum is σ = 417398940. Its totient is φ = 106006048.

The previous prime is 212012123. The next prime is 212012197. The reversal of 212012128 is 821210212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212012123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3312658 + ... + 3312721.

It is an arithmetic number, because the mean of its divisors is an integer number (34783245).

Almost surely, 2^212012128 is an apocalyptic number.

It is an amenable number.

212012128 is a deficient number, since it is larger than the sum of its proper divisors (205386812).

212012128 is an equidigital number, since it uses as much as digits as its factorization.

212012128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6625389 (or 6625381 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 212012128 is about 14560.6362498347. The cubic root of 212012128 is about 596.2845659999.

The spelling of 212012128 in words is "two hundred twelve million, twelve thousand, one hundred twenty-eight".