21332311312331 has 4 divisors (see below), whose sum is σ = 21334387864152. Its totient is φ = 21330234760512.

The previous prime is 21332311312307. The next prime is 21332311312427. The reversal of 21332311312331 is 13321311323312.

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 21332311312331 - 2¹⁰ = 21332311311307 is a prime.

It is a super-2 number, since 2×21332311312331² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21332311312294 and 21332311312303.

It is not an unprimeable number, because it can be changed into a prime (21332311302331) 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, 1038260501 + ... + 1038281046.

It is an arithmetic number, because the mean of its divisors is an integer number (5333596966038).

Almost surely, 2^{21332311312331} is an apocalyptic number.

21332311312331 is a deficient number, since it is larger than the sum of its proper divisors (2076551821).

21332311312331 is a wasteful number, since it uses less digits than its factorization.

21332311312331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2076551820.

The product of its digits is 5832, while the sum is 29.

Adding to 21332311312331 its reverse (13321311323312), we get a palindrome (34653622635643).

The spelling of 21332311312331 in words is "twenty-one trillion, three hundred thirty-two billion, three hundred eleven million, three hundred twelve thousand, three hundred thirty-one".