21112301011 has 4 divisors (see below), whose sum is σ = 21627235224. Its totient is φ = 20597366800.

The previous prime is 21112300999. The next prime is 21112301017. The reversal of 21112301011 is 11010321112.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 21112301011 - 2¹³ = 21112292819 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21112300982 and 21112301000.

It is not an unprimeable number, because it can be changed into a prime (21112301017) by changing a digit.

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, 257467045 + ... + 257467126.

It is an arithmetic number, because the mean of its divisors is an integer number (5406808806).

Almost surely, 2^21112301011 is an apocalyptic number.

21112301011 is a deficient number, since it is larger than the sum of its proper divisors (514934213).

21112301011 is an equidigital number, since it uses as much as digits as its factorization.

21112301011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514934212.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 21112301011 its reverse (11010321112), we get a palindrome (32122622123).

The spelling of 21112301011 in words is "twenty-one billion, one hundred twelve million, three hundred one thousand, eleven".