21002110230 has 64 divisors (see below), whose sum is σ = 51327924480. Its totient is φ = 5498277504.

The previous prime is 21002110219. The next prime is 21002110247. The reversal of 21002110230 is 3201120012.

It is a super-2 number, since 2×21002110230² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1385452 + ... + 1400528.

It is an arithmetic number, because the mean of its divisors is an integer number (801998820).

Almost surely, 2^21002110230 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21002110230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25663962240).

21002110230 is an abundant number, since it is smaller than the sum of its proper divisors (30325814250).

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

21002110230 is a wasteful number, since it uses less digits than its factorization.

21002110230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15933.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 21002110230 its reverse (3201120012), we get a palindrome (24203230242).

The spelling of 21002110230 in words is "twenty-one billion, two million, one hundred ten thousand, two hundred thirty".