21313021332313 has 32 divisors (see below), whose sum is σ = 22784362457472. Its totient is φ = 19908474969600.

The previous prime is 21313021332311. The next prime is 21313021332341. The reversal of 21313021332313 is 31323312031312.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21313021332313 - 2¹ = 21313021332311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21313021332311) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31171906 + ... + 31848292.

It is an arithmetic number, because the mean of its divisors is an integer number (712011326796).

Almost surely, 2^{21313021332313} is an apocalyptic number.

It is an amenable number.

21313021332313 is a deficient number, since it is larger than the sum of its proper divisors (1471341125159).

21313021332313 is a wasteful number, since it uses less digits than its factorization.

21313021332313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676825.

The product of its (nonzero) digits is 5832, while the sum is 28.

Adding to 21313021332313 its reverse (31323312031312), we get a palindrome (52636333363625).

The spelling of 21313021332313 in words is "twenty-one trillion, three hundred thirteen billion, twenty-one million, three hundred thirty-two thousand, three hundred thirteen".