210021210234 has 64 divisors (see below), whose sum is σ = 511701120000. Its totient is φ = 63322942320.

The previous prime is 210021210193. The next prime is 210021210239. The reversal of 210021210234 is 432012120012.

It is a happy number.

210021210234 is a `hidden beast` number, since 210 + 0 + 212 + 10 + 234 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (210021210239) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 770164 + ... + 1006575.

It is an arithmetic number, because the mean of its divisors is an integer number (7995330000).

Almost surely, 2^210021210234 is an apocalyptic number.

210021210234 is an abundant number, since it is smaller than the sum of its proper divisors (301679909766).

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

210021210234 is a wasteful number, since it uses less digits than its factorization.

210021210234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1776960 (or 1776954 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 210021210234 its reverse (432012120012), we get a palindrome (642033330246).

The spelling of 210021210234 in words is "two hundred ten billion, twenty-one million, two hundred ten thousand, two hundred thirty-four".