21131230102 has 8 divisors (see below), whose sum is σ = 31700581056. Its totient is φ = 10564369752.

The previous prime is 21131230093. The next prime is 21131230117. The reversal of 21131230102 is 20103213112.

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

It is a congruent number.

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, 601293 + ... + 635464.

It is an arithmetic number, because the mean of its divisors is an integer number (3962572632).

Almost surely, 2^21131230102 is an apocalyptic number.

21131230102 is a deficient number, since it is larger than the sum of its proper divisors (10569350954).

21131230102 is a wasteful number, since it uses less digits than its factorization.

21131230102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1245302.

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

Adding to 21131230102 its reverse (20103213112), we get a palindrome (41234443214).

The spelling of 21131230102 in words is "twenty-one billion, one hundred thirty-one million, two hundred thirty thousand, one hundred two".