21010013313 has 16 divisors (see below), whose sum is σ = 28118413440. Its totient is φ = 13954230656.

The previous prime is 21010013303. The next prime is 21010013317. The reversal of 21010013313 is 31331001012.

It is a cyclic number.

It is not a de Polignac number, because 21010013313 - 2⁹ = 21010012801 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21010013292 and 21010013301.

It is not an unprimeable number, because it can be changed into a prime (21010013317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1024981 + ... + 1045277.

It is an arithmetic number, because the mean of its divisors is an integer number (1757400840).

Almost surely, 2^21010013313 is an apocalyptic number.

It is an amenable number.

21010013313 is a deficient number, since it is larger than the sum of its proper divisors (7108400127).

21010013313 is a wasteful number, since it uses less digits than its factorization.

21010013313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21576.

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 21010013313 its reverse (31331001012), we get a palindrome (52341014325).

The spelling of 21010013313 in words is "twenty-one billion, ten million, thirteen thousand, three hundred thirteen".