21112000331 has 4 divisors (see below), whose sum is σ = 21316971312. Its totient is φ = 20907029352.

The previous prime is 21112000313. The next prime is 21112000333. The reversal of 21112000331 is 13300021112.

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

It is a cyclic number.

It is not a de Polignac number, because 21112000331 - 2³⁰ = 20038258507 is a prime.

It is a super-2 number, since 2×21112000331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21112000333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102485336 + ... + 102485541.

It is an arithmetic number, because the mean of its divisors is an integer number (5329242828).

Almost surely, 2^21112000331 is an apocalyptic number.

21112000331 is a deficient number, since it is larger than the sum of its proper divisors (204970981).

21112000331 is a wasteful number, since it uses less digits than its factorization.

21112000331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204970980.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 21112000331 its reverse (13300021112), we get a palindrome (34412021443).

The spelling of 21112000331 in words is "twenty-one billion, one hundred twelve million, three hundred thirty-one", and thus it is an aban number.