21312002110111 has 16 divisors (see below), whose sum is σ = 21905812454400. Its totient is φ = 20726347850208.

The previous prime is 21312002110103. The next prime is 21312002110127. The reversal of 21312002110111 is 11101120021312.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21312002110111 - 2³ = 21312002110103 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 (21312002110171) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62228406 + ... + 62569948.

It is an arithmetic number, because the mean of its divisors is an integer number (1369113278400).

Almost surely, 2^{21312002110111} is an apocalyptic number.

21312002110111 is a deficient number, since it is larger than the sum of its proper divisors (593810344289).

21312002110111 is a wasteful number, since it uses less digits than its factorization.

21312002110111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353478.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 21312002110111 its reverse (11101120021312), we get a palindrome (32413122131423).

The spelling of 21312002110111 in words is "twenty-one trillion, three hundred twelve billion, two million, one hundred ten thousand, one hundred eleven".