21231310102 has 16 divisors (see below), whose sum is σ = 31903987392. Its totient is φ = 10596666240.

The previous prime is 21231310073. The next prime is 21231310117. The reversal of 21231310102 is 20101313212.

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, 3164083 + ... + 3170785.

It is an arithmetic number, because the mean of its divisors is an integer number (1993999212).

Almost surely, 2^21231310102 is an apocalyptic number.

21231310102 is a deficient number, since it is larger than the sum of its proper divisors (10672677290).

21231310102 is a wasteful number, since it uses less digits than its factorization.

21231310102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9303.

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

Adding to 21231310102 its reverse (20101313212), we get a palindrome (41332623314).

The spelling of 21231310102 in words is "twenty-one billion, two hundred thirty-one million, three hundred ten thousand, one hundred two".