21334312331 has 8 divisors (see below), whose sum is σ = 22267242144. Its totient is φ = 20401828480.

The previous prime is 21334312327. The next prime is 21334312343. The reversal of 21334312331 is 13321343312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21334312331 - 2² = 21334312327 is a prime.

It is a super-2 number, since 2×21334312331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21334312331.

It is not an unprimeable number, because it can be changed into a prime (21334312361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11816 + ... + 206901.

It is an arithmetic number, because the mean of its divisors is an integer number (2783405268).

Almost surely, 2^21334312331 is an apocalyptic number.

21334312331 is a deficient number, since it is larger than the sum of its proper divisors (932929813).

21334312331 is a wasteful number, since it uses less digits than its factorization.

21334312331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222981.

The product of its digits is 3888, while the sum is 26.

Adding to 21334312331 its reverse (13321343312), we get a palindrome (34655655643).

The spelling of 21334312331 in words is "twenty-one billion, three hundred thirty-four million, three hundred twelve thousand, three hundred thirty-one".