21130302102 has 256 divisors, whose sum is σ = 55496060928. Its totient is φ = 5215518720.

The previous prime is 21130302091. The next prime is 21130302163. The reversal of 21130302102 is 20120303112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 80343223 + ... + 80343485.

It is an arithmetic number, because the mean of its divisors is an integer number (216781488).

Almost surely, 2^21130302102 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21130302102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27748030464).

21130302102 is an abundant number, since it is smaller than the sum of its proper divisors (34365758826).

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

21130302102 is a wasteful number, since it uses less digits than its factorization.

21130302102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21130302102 its reverse (20120303112), we get a palindrome (41250605214).

The spelling of 21130302102 in words is "twenty-one billion, one hundred thirty million, three hundred two thousand, one hundred two".