21112033311 has 12 divisors (see below), whose sum is σ = 30774932760. Its totient is φ = 13945562640.

The previous prime is 21112033297. The next prime is 21112033343. The reversal of 21112033311 is 11333021112.

21112033311 is a `hidden beast` number, since 211 + 120 + 3 + 331 + 1 = 666.

It is not a de Polignac number, because 21112033311 - 2⁷ = 21112033183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112033511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10759485 + ... + 10761446.

It is an arithmetic number, because the mean of its divisors is an integer number (2564577730).

Almost surely, 2^21112033311 is an apocalyptic number.

21112033311 is a deficient number, since it is larger than the sum of its proper divisors (9662899449).

21112033311 is a wasteful number, since it uses less digits than its factorization.

21112033311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21521046 (or 21521043 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 21112033311 its reverse (11333021112), we get a palindrome (32445054423).

The spelling of 21112033311 in words is "twenty-one billion, one hundred twelve million, thirty-three thousand, three hundred eleven".