21102320102 has 8 divisors (see below), whose sum is σ = 31654125696. Its totient is φ = 10550944872.

The previous prime is 21102320101. The next prime is 21102320111. The reversal of 21102320102 is 20102320112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21102320101) 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, 81368 + ... + 220964.

It is an arithmetic number, because the mean of its divisors is an integer number (3956765712).

Almost surely, 2^21102320102 is an apocalyptic number.

21102320102 is a deficient number, since it is larger than the sum of its proper divisors (10551805594).

21102320102 is a wasteful number, since it uses less digits than its factorization.

21102320102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215182.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21102320102 its reverse (20102320112), we get a palindrome (41204640214).

The spelling of 21102320102 in words is "twenty-one billion, one hundred two million, three hundred twenty thousand, one hundred two".