21213310102 has 16 divisors (see below), whose sum is σ = 32951832912. Its totient is φ = 10235927520.

The previous prime is 21213310061. The next prime is 21213310177. The reversal of 21213310102 is 20101331212.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1633908 + ... + 1646839.

It is an arithmetic number, because the mean of its divisors is an integer number (2059489557).

Almost surely, 2^21213310102 is an apocalyptic number.

21213310102 is a deficient number, since it is larger than the sum of its proper divisors (11738522810).

21213310102 is a wasteful number, since it uses less digits than its factorization.

21213310102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3280863.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21213310102 its reverse (20101331212), we get a palindrome (41314641314).

The spelling of 21213310102 in words is "twenty-one billion, two hundred thirteen million, three hundred ten thousand, one hundred two".