212023123128 has 64 divisors (see below), whose sum is σ = 588994444800. Its totient is φ = 70669415520.

The previous prime is 212023123127. The next prime is 212023123139. The reversal of 212023123128 is 821321320212.

212023123128 is a `hidden beast` number, since 21 + 202 + 312 + 3 + 128 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212023123127) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 4326523 + ... + 4375253.

It is an arithmetic number, because the mean of its divisors is an integer number (9203038200).

Almost surely, 2^212023123128 is an apocalyptic number.

It is an amenable number.

212023123128 is an abundant number, since it is smaller than the sum of its proper divisors (376971321672).

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

212023123128 is a wasteful number, since it uses less digits than its factorization.

212023123128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68889 (or 68879 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The spelling of 212023123128 in words is "two hundred twelve billion, twenty-three million, one hundred twenty-three thousand, one hundred twenty-eight".