210128612 has 18 divisors (see below), whose sum is σ = 370757142. Its totient is φ = 104205024.

The previous prime is 210128593. The next prime is 210128617. The reversal of 210128612 is 216821012.

It can be written as a sum of positive squares in only one way, i.e., 202322176 + 7806436 = 14224^2 + 2794^2 .

It is not an unprimeable number, because it can be changed into a prime (210128617) 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 5 ways as a sum of consecutive naturals, for example, 62888 + ... + 66144.

It is an arithmetic number, because the mean of its divisors is an integer number (20597619).

Almost surely, 2^210128612 is an apocalyptic number.

It is an amenable number.

210128612 is a deficient number, since it is larger than the sum of its proper divisors (160628530).

210128612 is a wasteful number, since it uses less digits than its factorization.

210128612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3515 (or 3386 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 210128612 is about 14495.8136025544. The cubic root of 210128612 is about 594.5135133211.

Adding to 210128612 its reverse (216821012), we get a palindrome (426949624).

The spelling of 210128612 in words is "two hundred ten million, one hundred twenty-eight thousand, six hundred twelve".