21031011313 has 8 divisors (see below), whose sum is σ = 22655627456. Its totient is φ = 19407373200.

The previous prime is 21031011311. The next prime is 21031011383. The reversal of 21031011313 is 31311013012.

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 21031011313 - 2¹ = 21031011311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21031011311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199533 + ... + 286138.

It is an arithmetic number, because the mean of its divisors is an integer number (2831953432).

Almost surely, 2^21031011313 is an apocalyptic number.

It is an amenable number.

21031011313 is a deficient number, since it is larger than the sum of its proper divisors (1624616143).

21031011313 is a wasteful number, since it uses less digits than its factorization.

21031011313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489015.

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 21031011313 its reverse (31311013012), we get a palindrome (52342024325).

The spelling of 21031011313 in words is "twenty-one billion, thirty-one million, eleven thousand, three hundred thirteen".