21310100313 has 16 divisors (see below), whose sum is σ = 29927980800. Its totient is φ = 13450430160.

The previous prime is 21310100293. The next prime is 21310100381. The reversal of 21310100313 is 31300101312.

It is not a de Polignac number, because 21310100313 - 2⁹ = 21310099801 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21310100292 and 21310100301.

It is not an unprimeable number, because it can be changed into a prime (21310100813) 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 15 ways as a sum of consecutive naturals, for example, 28383 + ... + 208388.

It is an arithmetic number, because the mean of its divisors is an integer number (1870498800).

Almost surely, 2^21310100313 is an apocalyptic number.

It is an amenable number.

21310100313 is a deficient number, since it is larger than the sum of its proper divisors (8617880487).

21310100313 is a wasteful number, since it uses less digits than its factorization.

21310100313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238372.

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

Adding to 21310100313 its reverse (31300101312), we get a palindrome (52610201625).

Subtracting 21310100313 from its reverse (31300101312), we obtain a palindrome (9990000999).

The spelling of 21310100313 in words is "twenty-one billion, three hundred ten million, one hundred thousand, three hundred thirteen".