21242430210210 has 128 divisors (see below), whose sum is σ = 56033756902656. Its totient is φ = 5111190589440.

The previous prime is 21242430210181. The next prime is 21242430210257. The reversal of 21242430210210 is 1201203424212.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 23625244 + ... + 24507896.

It is an arithmetic number, because the mean of its divisors is an integer number (437763725802).

Almost surely, 2^{21242430210210} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21242430210210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28016878451328).

21242430210210 is an abundant number, since it is smaller than the sum of its proper divisors (34791326692446).

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

21242430210210 is a wasteful number, since it uses less digits than its factorization.

21242430210210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883220.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 21242430210210 its reverse (1201203424212), we get a palindrome (22443633634422).

The spelling of 21242430210210 in words is "twenty-one trillion, two hundred forty-two billion, four hundred thirty million, two hundred ten thousand, two hundred ten".