210212421328 has 80 divisors (see below), whose sum is σ = 501361660800. Its totient is φ = 83146710528.

The previous prime is 210212421301. The next prime is 210212421329. The reversal of 210212421328 is 823124212012.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 210212421296 and 210212421305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210212421329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13732623 + ... + 13747921.

It is an arithmetic number, because the mean of its divisors is an integer number (6267020760).

Almost surely, 2^210212421328 is an apocalyptic number.

210212421328 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

210212421328 is an abundant number, since it is smaller than the sum of its proper divisors (291149239472).

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

210212421328 is a wasteful number, since it uses less digits than its factorization.

210212421328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24764 (or 24758 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The spelling of 210212421328 in words is "two hundred ten billion, two hundred twelve million, four hundred twenty-one thousand, three hundred twenty-eight".