21103010312113 has 4 divisors (see below), whose sum is σ = 21340122787620. Its totient is φ = 20865897836608.

The previous prime is 21103010312081. The next prime is 21103010312119. The reversal of 21103010312113 is 31121301030112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2201801919409 + 18901208392704 = 1483847^2 + 4347552^2 .

It is a cyclic number.

It is not a de Polignac number, because 21103010312113 - 2⁵ = 21103010312081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21103010312119) 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, 118556237620 + ... + 118556237797.

It is an arithmetic number, because the mean of its divisors is an integer number (5335030696905).

Almost surely, 2^{21103010312113} is an apocalyptic number.

It is an amenable number.

21103010312113 is a deficient number, since it is larger than the sum of its proper divisors (237112475507).

21103010312113 is an equidigital number, since it uses as much as digits as its factorization.

21103010312113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237112475506.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 21103010312113 its reverse (31121301030112), we get a palindrome (52224311342225).

The spelling of 21103010312113 in words is "twenty-one trillion, one hundred three billion, ten million, three hundred twelve thousand, one hundred thirteen".