21312102202 has 8 divisors (see below), whose sum is σ = 31970850912. Its totient is φ = 10655151900.

The previous prime is 21312102199. The next prime is 21312102221. The reversal of 21312102202 is 20220121312.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 419574 + ... + 467617.

It is an arithmetic number, because the mean of its divisors is an integer number (3996356364).

Almost surely, 2^21312102202 is an apocalyptic number.

21312102202 is a deficient number, since it is larger than the sum of its proper divisors (10658748710).

21312102202 is a wasteful number, since it uses less digits than its factorization.

21312102202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 899204.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21312102202 its reverse (20220121312), we get a palindrome (41532223514).

The spelling of 21312102202 in words is "twenty-one billion, three hundred twelve million, one hundred two thousand, two hundred two".