21302102112 has 24 divisors (see below), whose sum is σ = 55918018296. Its totient is φ = 7100700672.

The previous prime is 21302102099. The next prime is 21302102117. The reversal of 21302102112 is 21120120312.

It is a tau number, because it is divible by the number of its divisors (24).

It is a junction number, because it is equal to n+sod(n) for n = 21302102091 and 21302102100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21302102117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110948353 + ... + 110948544.

It is an arithmetic number, because the mean of its divisors is an integer number (2329917429).

Almost surely, 2^21302102112 is an apocalyptic number.

It is an amenable number.

21302102112 is an abundant number, since it is smaller than the sum of its proper divisors (34615916184).

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

21302102112 is a wasteful number, since it uses less digits than its factorization.

21302102112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221896910 (or 221896902 counting only the distinct ones).

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

Adding to 21302102112 its reverse (21120120312), we get a palindrome (42422222424).

The spelling of 21302102112 in words is "twenty-one billion, three hundred two million, one hundred two thousand, one hundred twelve".