21302121030102 has 48 divisors (see below), whose sum is σ = 50631755503680. Its totient is φ = 6419125676400.

The previous prime is 21302121030053. The next prime is 21302121030121. The reversal of 21302121030102 is 20103012120312.

21302121030102 is a `hidden beast` number, since 2 + 130 + 21 + 210 + 301 + 0 + 2 = 666.

It is a super-2 number, since 2×21302121030102² (a number of 27 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 300485424 + ... + 300556307.

It is an arithmetic number, because the mean of its divisors is an integer number (1054828239660).

Almost surely, 2^{21302121030102} is an apocalyptic number.

21302121030102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21302121030102 is an abundant number, since it is smaller than the sum of its proper divisors (29329634473578).

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

21302121030102 is a wasteful number, since it uses less digits than its factorization.

21302121030102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601041929 (or 601041926 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21302121030102 its reverse (20103012120312), we get a palindrome (41405133150414).

The spelling of 21302121030102 in words is "twenty-one trillion, three hundred two billion, one hundred twenty-one million, thirty thousand, one hundred two".