21313342111 has 16 divisors (see below), whose sum is σ = 22000252608. Its totient is φ = 20639808000.

The previous prime is 21313342109. The next prime is 21313342121. The reversal of 21313342111 is 11124331312.

It is a cyclic number.

It is not a de Polignac number, because 21313342111 - 2¹ = 21313342109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21313342121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1030605 + ... + 1051081.

It is an arithmetic number, because the mean of its divisors is an integer number (1375015788).

Almost surely, 2^21313342111 is an apocalyptic number.

21313342111 is a deficient number, since it is larger than the sum of its proper divisors (686910497).

21313342111 is a wasteful number, since it uses less digits than its factorization.

21313342111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20802.

The product of its digits is 432, while the sum is 22.

Adding to 21313342111 its reverse (11124331312), we get a palindrome (32437673423).

The spelling of 21313342111 in words is "twenty-one billion, three hundred thirteen million, three hundred forty-two thousand, one hundred eleven".