21130342111 has 8 divisors (see below), whose sum is σ = 22607097200. Its totient is φ = 19690050240.

The previous prime is 21130342097. The next prime is 21130342133. The reversal of 21130342111 is 11124303112.

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

It is a cyclic number.

It is not a de Polignac number, because 21130342111 - 2¹⁹ = 21129817823 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21130343111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9114606 + ... + 9116923.

It is an arithmetic number, because the mean of its divisors is an integer number (2825887150).

Almost surely, 2^21130342111 is an apocalyptic number.

21130342111 is a deficient number, since it is larger than the sum of its proper divisors (1476755089).

21130342111 is a wasteful number, since it uses less digits than its factorization.

21130342111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18231609.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21130342111 its reverse (11124303112), we get a palindrome (32254645223).

The spelling of 21130342111 in words is "twenty-one billion, one hundred thirty million, three hundred forty-two thousand, one hundred eleven".