21302112102 has 16 divisors (see below), whose sum is σ = 42611469120. Its totient is φ = 7099496552.

The previous prime is 21302112071. The next prime is 21302112103. The reversal of 21302112102 is 20121120312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21302112103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 263268 + ... + 334535.

It is an arithmetic number, because the mean of its divisors is an integer number (2663216820).

Almost surely, 2^21302112102 is an apocalyptic number.

21302112102 is an abundant number, since it is smaller than the sum of its proper divisors (21309357018).

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

21302112102 is a wasteful number, since it uses less digits than its factorization.

21302112102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603747.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21302112102 its reverse (20121120312), we get a palindrome (41423232414).

The spelling of 21302112102 in words is "twenty-one billion, three hundred two million, one hundred twelve thousand, one hundred two".