21113120102 has 8 divisors (see below), whose sum is σ = 31672496496. Its totient is φ = 10555621272.

The previous prime is 21113120071. The next prime is 21113120111. The reversal of 21113120102 is 20102131112.

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 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, 440933 + ... + 486464.

It is an arithmetic number, because the mean of its divisors is an integer number (3959062062).

Almost surely, 2^21113120102 is an apocalyptic number.

21113120102 is a deficient number, since it is larger than the sum of its proper divisors (10559376394).

21113120102 is a wasteful number, since it uses less digits than its factorization.

21113120102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 938782.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21113120102 its reverse (20102131112), we get a palindrome (41215251214).

It can be divided in two parts, 2111 and 3120102, that added together give a palindrome (3122213).

The spelling of 21113120102 in words is "twenty-one billion, one hundred thirteen million, one hundred twenty thousand, one hundred two".