21213302102 has 8 divisors (see below), whose sum is σ = 31908589200. Its totient is φ = 10577105704.

The previous prime is 21213302057. The next prime is 21213302107. The reversal of 21213302102 is 20120331212.

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 (21213302107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14771777 + ... + 14773212.

It is an arithmetic number, because the mean of its divisors is an integer number (3988573650).

Almost surely, 2^21213302102 is an apocalyptic number.

21213302102 is a deficient number, since it is larger than the sum of its proper divisors (10695287098).

21213302102 is a wasteful number, since it uses less digits than its factorization.

21213302102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29545350.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21213302102 its reverse (20120331212), we get a palindrome (41333633314).

The spelling of 21213302102 in words is "twenty-one billion, two hundred thirteen million, three hundred two thousand, one hundred two".